guest blog – MORE TREES, PLEASE! By Filwood Tree Champion, Jim Smith

Great work, Jim!

Knowle West Alliance

Early in 2020, I was offered 100 oak trees for £20 via the Bristol Tree Forum of which I’m a member. I applied for and obtained a £100 Grant from Knowle West Alliance to purchase these trees (50 cm ‘whips’), badge making materials, marking pens, labels and ties to run an ‘adopt a tree’ project with children in Knowle West.

With support from KWA, I approached the local schools to get children involved and was also given permission to plant in some of the schools’ grounds. The materials would be used to mark each school child’s individual tree, as well as create an ‘Eco Champion’ badge, personalised by each child – I borrowed the Brislexic badge making machine which Claudia Collins had bought with a KWA Small Grant the previous year.

Badges made by local children

Chris Ingram from The Factory (Filwood Green Business Park) gave me some wood ‘off…

View original post 176 more words

Our proposal for a new Bristol Tree Replacement Standard

The Bristol Tree Replacement Standard (BTRS), which was adopted nearly a decade ago in 2013, provides a mechanism for calculating the number of replacements for any trees that are removed for developments. It was ground-breaking in its time as it typically required more than 1:1 replacement.

The presumption should always be that trees should be retained. The application of BTRS should only ever be a last resort. It should not be the default choice, which it seems to have become.

The starting point for any decision on whether to remove trees (or any other green asset) is the Mitigation Hierarchy[2] which states, firstly, avoid; then, if that is not possible, minimise; then, if that is not possible, restore; and, as a last resort, compensate (the purpose or BTRS). BCS9 adopts this approach and states that:

Individual green assets should be retained wherever possible and integrated into new developments.

However, with the emergence of a new Local Plan for Bristol, we believe that the time has come for BTRS to be revised to reflect our changing understanding of the vital importance of trees to the city in the years since the last version of the Local Plan was adopted in 2014.

In addition, Bristol has adopted Climate and Ecological Emergency Declarations so a new BTRS will be an important part of implementing these declarations. Nationally, the new Environment Act 2021 (EA 2021) is coming into force late next year.

Our proposal provides a mechanism for complying with the new legal requirement for 10% Biodiversity Net Gain (BNG) which will be mandatory when EA 2021 takes effect.

Background

Under current policy – BCS9 and DM17 – trees lost to development must be replaced using this table:

Table 1 The Current BTRS replacement tree table

However, when the balance of the Environment Act 2021 (EA 2021) takes effect late in 2023, the current version of BTRS will not, in most cases, be sufficient to achieve the 10% biodiversity net gain (BNG) that will be required for nearly all developments. Section 90A will be added to the Town and Country Planning Act 1990 and will set out the level of biodiversity net gain required ( Schedule 14 of the EA 2021).

The Local Government Association says of BNG that it:

…delivers measurable improvements for biodiversity by creating or enhancing habitats in association with development. Biodiversity net gain can be achieved on-site, off-site or through a combination of on-site and off-site measures.[3]

GOV.UK says of the Biodiversity Metric that:

where a development has an impact on biodiversity, it will ensure that the development is delivered in a way which helps to restore any biodiversity loss and seeks to deliver thriving natural spaces for local communities.[4]

This aligns perfectly with Bristol’s recent declarations of climate and ecological emergencies and with the aspirations of the Ecological Emergency Action Plan,[5] which recognises that a BNG of 10% net gain will become mandatory for housing and development and acknowledges that:

These strategies [the Local Nature Recovery Strategies] will guide smooth and effective delivery of Biodiversity Net…

Our proposed new BTRS model

We propose that the Bristol Tree Replacement Standard be amended to reflect the requirements of the EA 2021 and BNG 3.1 and that the BTRS table (Table 1) be replaced with Table 2 below:

Table 2 The proposed new BTRS tree replacement table

The Replacement Trees Required number is based on the habitat area of each of the three BNG 3.1 tree categories (Table 7-2 below) divided by the area habitat of one 30-year old BNG 3.1 Small tree (Table 3 below) plus 10% net gain. This is rounded up to the nearest whole number since you can’t plant a fraction of a tree.

The reasoning for our proposal is set out below:

Applying the Biodiversity Metric to Urban trees

The most recent Biodiversity Metric (BNG 3.1) published by Natural England, defines trees in urban spaces as Urban tree habitats. The guidance states that:

the term ‘Urban tree’ applies to all trees in urban situations. Urban trees may be situated within public land, private land, institutional land and land used for transport functions.

Table 7-1 divides Urban tree habitats into three categories:

Calculating Urban tree habitat

Urban tree baseline habitat area is measured in hectares and is based on the Root Protection Area[7] (RPA) of each tree impacted by a proposed development. RPA is used instead of tree canopy because it is considered to be the best proxy for tree biomass.

In most cases, RPA is obtained from an Arboricultural Impact Assessment (AIA), which complies with British Standard 5837 2012 – Trees in relation to design, demolition and construction (BS:5837).

Where no AIA is available, Table 7-2 is used:

Note that the tree’s size will still need to be ascertained, and that any tree with a stem diameter (DBH) 75mm or more and of whatever quality (even a dead tree, which offers its own habitat benefits) is included . Under BTRS, trees with a DBH smaller than 150 mm are excluded, as are BS:5837 category “U” trees.

The guidance also makes it clear that, given the important ecosystem services value provided by trees, where possible like-for-like compensation is the preferred approach, so that lost Urban trees are replaced by Urban trees rather than by other types of urban habitat.[8]

Replacing lost trees

To calculate the number of trees required to replace Urban tree habitat being lost, table 7-2 above is used on this basis:

Size classes for newly planted trees should be classified by projected size at 30 years from planting.

We have used the median DBH sizes for new stock trees as set out in BS 3936-1: Nursery Stock Specification for trees and shrubs as the basis for calculating the eventual size of a newly planted trees after 30 years and assumed that a tree adds 2.54 cm (1”) to its girth annually.

This results in a predicted stock tree size after 30 years’ growth. This is then assigned to one of the three Urban tree categories set out in table 7-2: Small, Medium or Large. In all cases save for Semi-mature tree stock, the eventual size of stock trees after 30 years falls within the BNG 3.1 size category Small, which has a habitat area of 0.0041 hectares. This value is then used to calculate how many new trees will be required to replace trees lost to the development, plus a 10% biodiversity net gain. This gives a compensation size per replacement tree of 0.0045 ha.

Table 3 below shows the basis of our calculation:

Table 3 Annual stock tree growth predictions

The likely impact of this policy change

We have analysed tree data for 1,038 surveyed trees taken from a sample of AIAs submitted in support of previous planning applications. Most of the trees in this sample, 61%, fall within the BNG 3.1 Small range, 38% within the Medium range, with the balance, 1%, categorised as Large.

Table 4 below sets out the likely impact of the proposed changes to BTRS. It assumes that all these trees were removed (though that was not the case for all the planning applications we sampled):

Table 4 Proposed BTRS impact analysis

The spreadsheet setting out the basis of our calculations can be downloaded here – RPA Table 7-2 Comparison.

Our proposed changes to BTRS (published in the Planning Obligations Supplementary Planning Document, page 20) are set out in Appendix 1.

Appendix 1

Our proposed changes to BTRS, set out in the Planning Obligations Supplementary Planning Document, page 20.

Trees – Policy Background

The justification for requiring obligations in respect of new or compensatory tree planting is set out in the Environment Act 2021, Policies BCS9 and BCS11 of the Council’s Core Strategy and in DM 17 of the Council’s Site Allocations and Development Management Policies.

Trigger for Obligation

Obligations in respect of trees will be required where there is an obligation under the Environment Act 2021 to compensate for the loss of biodiversity when Urban tree habitat is lost as a result of development.

Any offsite Urban tree habitat creation will take place in sites which are either on open ground or in areas of hard standing such as pavements.

Where planting will take place directly into open ground, the contribution will be lower than where the planting is in an area of hard standing. This is because of the need to plant trees located in areas of hard standing in an engineered tree pit.

All tree planting on public land will be undertaken by the council to ensure a consistent approach and level of quality, and to reduce the likelihood of new tree stock failing to survive.

Level of Contribution

The contribution covers the cost of providing the tree pit (where appropriate), purchasing, planting, protecting, establishing and initially maintaining the new tree. The level of contribution per tree is as follows[9]:

  • Tree in open ground (no tree pit required) £765.21
  • Tree in hard standing (tree pit required) £3,318.88

The ‘open ground’ figure will apply where a development results in the loss of Council-owned trees planted in open ground. In these cases, the Council will undertake replacement tree planting in the nearest appropriate area of public open space.

In all other cases, the level of offsite compensation required will be based on the nature (in open ground or in hard standing) of the specific site which will has been identified by the developer and is approved by the Council during the planning approval process. In the absence of any such agreement, the level of contribution will be for a tree in hard standing.

The calculation of the habitat required to compensate for loss of Urban trees is set out in Table 7-2 of the Biodiversity Metric (BNG), published from time to time by Natural England. This may be updated as newer versions of BNG are published.

The following table will be used when calculating the level of contribution required by this obligation:


A copy of this blog can be downloaded here:

BTF proposal for a new Bristol Tree Replacement Standard


[1] Biodiversity Metric 3.1 – Auditing and accounting for biodiversity – USER GUIDE.

[2] https://nationalzoo.si.edu/ccs/mitigation-hierarchy.

[3] https://www.local.gov.uk/pas/topics/environment/biodiversity-net-gain.

[4] https://www.gov.uk/government/news/biodiversity-30-metric-launched-in-new-sustainable-development-toolkit.

[5] https://www.bristol.gov.uk/documents/20182/5572361/Ecological_Emergency_Action_Plan.pdf/2e98b357-5e7c-d926-3a52-bf602e01d44c?t=1630497102530.

[6] DBH = Diameter at Breast Height. RPAr = Root Protection Area radius. Area = the calculated BNG habitat area.

[7] RPA area = π × r2 where r is 12 x the tree’s DBH for a single stemmed tree. For multi-stemmed trees, the DBH of the largest stem in the cluster should be used to determine r.

GOV.UK advice is that r should be at least 15 times larger than DBH – https://www.gov.uk/guidance/ancient-woodland-ancient-trees-and-veteran-trees-advice-for-making-planning-decisions.

The Woodland Trust also recommends that r be set to 15 x DBH for ancient and veteran trees – https://www.woodlandtrust.org.uk/blog/2021/04/root-protection-areas.

[8] Paragraph 7.8 – Trading Rules.

[9] These values should be updated to the current rates applicable at the time of adoption. The current indexed rates as of April 2022 are £1,041.6 & £4,517.89 respectively.

[10] DBH = Diameter at Breast Height. RPAr = Root Protection Area radius. Area = the calculated BNG habitat area.

Valuing our urban trees – part III

When is tree not a tree?

Figure 1  Leyland cypress trees on the boundary of the former Police Dog & Horse Training Centre, Bristol.

The Biodiversity Metric 3.0 (BNG 3.0) User Guide defines Urban Tree habitats as follows:

Individual TreesYoung trees over 75mm in diameter measured at 1.5m from ground level and individual semi-mature and mature trees of significant stature and size that dominant their surroundings whose canopies are not touching but that are in close proximity to other trees.
Perimeter BlocksGroups or stands of trees within and around boundaries of land, former field boundary trees incorporated into developments, individual trees whose canopies overlap continuously.
Linear BlocksLines of trees along streets, highways, railways and canals whose canopies overlap continuously.

These habitats are measured by area (hectares). Using this measurement and other parameters (Distinctiveness, Condition and Strategic Significance), their baseline biodiversity value is calculated in area biodiversity habitat units (ABHUs).

BNG 3.0 also includes separate calculations for two types of linear habitat, one of which is ‘Hedgerows and Lines of Trees’. These linear habitats are measured in kilometres. Using this measurement and the same parameters used for ABHUs, their baseline biodiversity value is calculated in hedgerow biodiversity units (HBUs).

Hedgerow habitats are a feature almost unique to the British Isles, but ‘Lines of Trees’ have been included as a linear habitat as they ‘display some of the same functional qualities as hedgerows’.

Box 8-2 of the BNG 3.0 User Guide (Figure 2) uses this key to help identify Hedgerow or Line of Trees habitat types:

Figure 2 Box 8.2 – BNG 3.0 User Guide

The BNG 3.0 User Guide states that ‘Urban trees are considered separately to lines of trees in the wider environment, since they generally occur in an urban environment surrounded by developed land’. However, it is possible for disagreements to arise where the site is not clearly part of ‘an urban environment’, even though the trees fall within the Urban Tree habitat definition as either Perimeter or Linear Blocks.

A recent example demonstrates the issue. It involved 34 Leyland cypress trees growing along the boundary of the former Police Dog & Horse Training Centre on Clanage Road, Bristol, on the edge of the city. These trees were planted to form a screen between Clanage Road and the training centre (Figures 1 & 3).

This issue was argued before the Planning Inspector when the Secretary of State called the matter in (APP/Z0116/V/21/3270776) following a grant of planning permission for a change of use to a touring caravan site.

It was agreed at the inquiry that these trees had been planted between 1.5 to 2 metres apart, had developed average stem diameters of 33 cm and had grown to about 10 metres high and eight metres wide. The whole row is about 72 metres (0.072 km) long.

Figure 3 The site on the edge of the city (red boundary line)

Using the flow chart at Box 8-2 above, the developer’s ecologist argued that these trees were a Hedge Ornamental Non-native habitat. So, using the BNG 3.0 calculator, they would be assessed as a linear habitat 0.072 kilometres long. This habitat is given a Very Low Distinctiveness (score 1) and has a Poor Condition (score 1) [1]. Because of its location, it was given a Strategic Significance of Within area formally identified in local strategy (score 1.15). As such, the baseline habitat value is calculated as 0.072 x 1 x 1 x 1.15 = 0.08 HBUs.

We argued that these trees formed an Urban Tree habitat and that, using the BNG 3.0 calculator, it should be treated as 34 Medium-sized trees with a combined area of 0.1384 hectares with a Medium Distinctiveness (score 4) and is in Poor Condition (score 1) – even though it was agreed that the trees were in good condition and could be categorised as B2 using BS 5837:2012. Because of its location, it was given a Strategic Significance of Within area formally identified in local strategy (score 1.15). On this basis, the baseline habitat value is calculated as 0.1384 x 4 x 1 x 1.15 = 0.64 ABHUs (nearly 8 times the HBU value).

Whilst Rule 4 of the BNG 3.0 User Guide (page 37) states that ‘… the three types of biodiversity units generated by this metric (for area, hedgerow and river habitats) are unique and cannot be summed’, it is clear that adopting either of these two approaches will result in very different outcomes when assessing biodiversity net gain.

In our view it is vital not to undervalue baseline habitats by the selective use of the habitat definitions given in BNG 3.0.

The planning inquiry decision (refusal) has now been published – APP/Z0116/V/21/3270776.

A copy of this blog is available here.


Valuing our urban trees – part I

Valuing our urban trees – part II


[1] The Very Low Distinctiveness and Poor Condition parameters are the only options available for this habitat type under BNG 3.0.

Valuing our urban trees – part II

Assessing the condition of urban tree habitats using Biodiversity Metric 3.0

Our recent blog – Valuing our urban trees I, pointed out the failings of the methodology for calculating the size of urban tree habitats as set out in Biodiversity Metric 3.0 (BNG 3.0). We would now like to show how this is compounded by the inappropriate assessment criteria used to determine the condition of Urban Tree habitats, as also set out in BNG 3.0 (see Annex 1).

We use the following example – taken from a recently approved planning application [1] which will result in the removal of 13 urban trees – to demonstrate why this is approach is inappropriate.

Figure 1 The example tree – Google Street View 2020

This street tree is a London Plane (Platanus × acerifolia) with a stem diameter (called DBH) of 118 cm. It is a non-native species planted in hard standing on Bridge St, Bristol BS1 2AN in about 1967. Using BS 5837:2012Trees in relation to design, demolition and construction – Recommendations (a BSI Standards Publication), it has been categorised as A,1,2 (see Annex 2). The developer’s Arboriculturalist described it as having a ‘Large, broad crown with excellent form and vigour.’

The tree’s BS 5837:2012-calculated Root Protection Area (RPA) radius[3] is 14.6 metres, so it has an RPA of 630 square metres. The tree has an average crown radius of 9.88 metres and a calculated canopy area of 306 square metres.

Using BNG 3.0 TABLE 7-2: Urban tree size by girth and their area equivalent (see Annex 1), the calculated RPA of the tree is set at Large, so its habitat size is limited to just 113 square metres – a discount of 82% of its calculated RPA and 37% of its canopy area.

Notwithstanding categorisation of the tree as A,1,2, the BNG 3.0 Condition Assessment Criteria categorises the condition of this tree as Poor because it meets only two of the six criteria, as shown below:

Using BNG 3.0, the calculation of the baseline habitat (called Habitat Units) of this tree is as follows:

Had the BS 5837:2012 condition of the tree been allowed for and its condition set to ‘Good’, then the habitat units of this tree would be three times the habitat unit value of 0.0452, i.e., 0.1356 as shown below.

Not only has the true size of the urban tree habitat been significantly undervalued (because its actual RPA has not been used), but its assessed condition using the BNG 3.0 criteria is also clearly inappropriate given that this tree has been assessed at the highest category under BS 5837:2012:

Category A – Trees of high quality with an estimated remaining life expectancy of at least 40 years …that are particularly good examples of their species, especially if rare or unusual; or those that are essential components of groups or formal or semi-formal arboricultural features (e.g., the dominant and/or principal trees within an avenue).

The proposed solution

BNG 3.0 is seriously flawed when it comes to evaluating Urban Tree habitats. We have already commented on this when it comes to calculating habitat size.

In our view, the solution to the issue of assessing the correct condition of urban tree habitats is already available in BS 5837:2012. The standard may require some amendment to align it with BNG 3.0, but it is a well-established and practical approach used by the arboricultural community. This British Standard gives recommendations and guidance on the relationship between trees and design, demolition and construction processes and is used whether or not planning permission is required.

A copy of this blog can be downloaded here.


Our third blog dealing with habitat selection is available here – Valuing our urban trees – part III.


Annex 1

The Biodiversity Metric 3.0 – auditing and accounting for biodiversity

USER GUIDE (page 68)

TECHNICAL SUPPLEMENT (pages 193-194)


Annex 2

BS5837:2012 – 4.5 Tree categorization method – tree category definitions


[1] The Developer used BNG 2.0 in its submissions and applied a different Condition assessment to the one used here.

Bristol Tree Forum tree planting campaign – free Birch, Alder and Oak saplings available for planting

Last year we were pleased to be able to provide – free of charge – 1,600 oak saplings for tree lovers to plant around Bristol, and as it turns out, around the country.

STOP PRESS 11 Feb 2022 – We have now reached our target and are no longer taking any new Orders. Thank you all for your support.

Due to COVID-19 restrictions in 2020 and delays in government funding, there were postponements and cancellations of many major tree planting projects. A consequence of this was that large numbers of tree saplings planned for planting projects were threatened with destruction, including 750,000 two year old English oak tree saplings at the Maelor Forest Nursery in Wrexham.

Rather than see these trees destroyed, Bristol Tree Forum purchased 1,000 of the oak saplings for free distribution to anyone able to plant them.

As a result of the amazing response to this scheme we increased our order to 1600 saplings all of which were distributed and planted.

Oak plantings in and around Bristol
…. and beyond

Due to the success of last year’s project, the Bristol Tree Forum have ordered another thousand saplings. Because we may have somewhat exhausted the demand for oaks, this year we have ordered a mixture of white (or downy) birch  and alder. Both are native trees of great benefit to wildlife, and are tolerant of poor soil and wet conditions.

White Birch
Black alder (T Davis Sydnor)

For those that would prefer oak saplings, we have partnered with the Arkbound Foundation who are distributing oaks as part of their Oakupy project. These can either be ordered using the form below, or directly from Oakupy. We will get delivery in late January or early February. The trees can be collected from a site in Redland, Bristol.

The saplings come bare-rooted (i.e. out of the soil) and need to be planted as soon as possible after collection, although the viability of the trees over winter can be extended by storing the trees with the roots covered in damp soil.

The form below is to find out who would like to have saplings for planting and how many, and for you to provide basic contact details (email and/or phone number) for us to organise collection of the trees. Contact details will not be used for any other purpose.

The importance of planting trees?

Despite advances in carbon capture technology, the most efficient and cost-effective way to sequester carbon from the atmosphere is to plant trees. For instance, a single mature oak tree is the equivalent of 18 tonnes of CO2 or 16 passenger return transatlantic flights.

Recent scientific reports estimate that planting trees wherever we can, without occupying land used for other purposes, would absorb up to two thirds of the carbon emitted in the last century.

Trees are vital in supporting biodiversity, with oak trees capable of supporting over 2,300 different species, including birds, mammals, invertebrates, mosses, lichen and fungi.

Trees improve air quality by absorbing both gaseous (e.g., NO2) and particulate pollution. They reduce traffic noise and flooding and improve physical and mental wellbeing. Crucially, with life threatening heat waves predicted to occur every other year by 2050, trees can reduce the city heat island effect, potentially saving lives.

This project is funded by the Bristol Tree Forum in partnership with the Arkbound Foundation.

Mislabelling Bristol’s crucial open spaces as “brownfield” sites to justify development

A recent landmark Council motion to Protect the Green Belt and Bristol’s Green Spaces, was approved with cross-party support and no dissensions. As a result, vital green spaces within Bristol now have additional protection, in line with the City’s declarations of Climate and Ecological Emergencies, the recently published Ecological Emergency Action Plan and the new Environment Act 2021.

However, a consequence of the adoption of this motion is that there is greater pressure to develop on  other sites.  Those advocating development on open spaces within Bristol have begun, arbitrarily and without proper justification, to declare such open spaces to be brownfield. To inaccurately describe a development site as brownfield places Development Committee members under undue pressure to approve a planning application when, as greenfield, a site should fall under the additional protection engendered by the landmark motion.

Baltic Wharf Caravan Park

Recent examples (see below) where the term brownfield has been misused  are the Bristol Zoo Gardens car park on College Rd, Clifton and the Baltic Wharf Caravan Park on the Floating Harbour in Hotwells, each of which have been mislabelled as brownfield sites despite not falling within with the recognised legal definition.

Bristol Zoo Gardens car park

The term brownfield site is used to describe certain types of previously developed land. Most dictionary definitions refer to this land as being currently or previously occupied by a permanent structure which generally includes the potential for contamination. In planning law there is a definition which must apply when considering planning proposals. This is detailed in the National planning policy framework (NPPF – called ‘Previously developed land’, p.70) as:

Land which is or was occupied by a permanent structure…. and any associated fixed surface infrastructure”.

The definition excludes land which is maintained as a garden:

….. land in built-up areas such as residential gardens, parks, recreation grounds and allotments…

In addition to the definition, there is a statutory requirement for local authorities to maintain an up to date register of brownfield sites which are appropriate for development:

Regulation 3 of the Town and Country Planning (Brownfield Land Register) Regulations 2017 requires local planning authorities in England to prepare, maintain and publish registers of previously developed (brownfield) land”.

Brownfield land registers will provide up-to-date and consistent information on sites that local authorities consider to be appropriate for residential development having regard to the criteria set out in regulation 4 of the Town and Country Planning (Brownfield Land Register) Regulations 2017.” 

“Regulation 17 requires local planning authorities to review their registers at least once a year“.

The Town and Country Planning act also addresses the situation where a fragment of the site might be considered brownfield, but other parts of the curtilage is green space:

Greenfield land is not appropriate for inclusion in a brownfield land register. Where a potential site includes greenfield land within the curtilage, local planning authorities should consider whether the site falls within the definition of previously developed (brownfield) land in the National Planning Policy Framework. Where it is unclear whether the whole site is previously developed land, only the brownfield part of the site should be included in Part 1 of the register and considered for permission in principle”.


Mislabelling as brownfield examples in recent planning applications

Bristol Zoo Gardens car park, College Rd, Clifton (21/01999/F)

The planning proposal makes the statement “The application site is brownfield, previously developed land, as it is a car park“. Mayor Marvin Rees similarly defined the site in a subsequent tweet criticising some members of the Development Committee for voting against the proposal.

This site fails to comply with the proper planning definition of a brownfield site. In relation to the NPPF definition, 7.4% of the site is occupied by buildings whereas tree canopy covers about 17% of the site. Much of the site is covered by unfixed surface, which does not qualify under the definition of a brownfield site. Therefore, according to the Town and Country Planning Act only 7.4% of the site could be considered brownfield, with the remaining 92.6% being classified as greenfield. The site does not appear on the Council’s register of brownfield sites, and therefore cannot legally be classified as such.

Baltic Wharf Caravan Park (21/01331/F)

This planning proposal has also been inappropriately described as a brownfield site in the planning application. Only 2.6% of the site is occupied by a permanent structure, whereas the 100 trees that occupy this site cover over 30% of its area. Thus, only 2.6% of the site could possibly be defined as brownfield, with the remaining 97.4% falling under the classification of greenfield. Furthermore, as much of the site is maintained as a “residential garden”, the site is exempt from the NPPF definition. This site, also, is absent from the necessarily up-to-date register of brownfield sites.

Whilst there may be arguments to develop some parts of some of these sites, the existing trees should be retained in order to comply with Local Planning Policy BCS9.  The current approach  of flattening all trees, including those  on the edge of the site results in third rate developments.  Instead, new developments should be built around existing trees.


Petition

If you agree that this mislabelling should stop, please sign this petition to protect Bristol’s green spaces from the Council’s mislabelling of them as “brownfield sites”:

Protect Baltic Wharf and Bristol’s Other Green Spaces

Baltic Wharf Caravan Park: a controversial planning proposal

We have never been able to understand why Bristol City Council decided to terminate the lease of the longstanding and very successful central Bristol caravan site. It is not a brownfield site crying out for redevelopment, as some would have us believe. Its success and the 91 mature, well-established trees that grace it (74 of which are to be removed) testify to that.

Bristol Chamber of Commerce has described this caravan park as ‘… an important, high performing asset for Bristol’s visitor economy, enabling visitors to stay in walking distance of the city centre and thus providing significant levels of custom for local businesses‘.

And John Hirst, as Chief Executive of Destination Bristol, observed that ‘There are significant financial benefits for Bristol due to the year round supply of visitors to their current caravan site. We know that the current Bristol site at Baltic Wharf has been one of the most popular and successful central sites in the UK’.

So why on earth close the caravan park for a plan that almost nobody really wants – at least 273 at the last count? It seems that it’s worth closing this successful tourist attraction to replace it with new housing, even though the caravan park is estimated to bring some £1 to £1.5 million annually to Bristol’s tourist economy. The scramble for new housing at any cost – while ignoring the wishes of local communities and the economic benefits that the caravan park brings us – seems to take priority over all else.

And the result? We have proposals that will flatten every inconvenient tree rather than incorporating them into the proposed development. This only adds to the steady loss of green spaces and reduces Bristol, especially the centre of Bristol, to a grim, unliveable environment.  As Bristol grows hotter with each passing year, with the expectation that by 2050 life-threatening heatwaves will occur once every two years (not to mention the increasing flood risk to this area), we will need the cooling benefit of large, mature trees yet, tree by tree, they are inexorably removed in order to maximise profit and achieve what many say is an unrealisable aspiration. With the majority of new housing being sold at full market price, these will be as much for the benefit of the estimated 1,900 annual migrants from London as they are for the more affluent citizens of Bristol.

It is especially sad that Goram Homes, the much-lauded development arm of Bristol City Council, continues to ignore our very own key green planning policy, BCS9, and the revised National Planning Policy Framework (the Framework) upon which it is based. BCS9 states that ‘Individual green assets should be retained wherever possible and integrated into new development’.

The Framework is the foundation upon which BCS9 is based:

We had hoped that Goram Homes would have set a good example – especially since the Council has recently published its Ecological Emergency Action Plan and announced that it will “embed nature into all decisions” – and abide by these important principles. What has happened to the Framework’s third, overarching environmental objective? Taking Baltic Wharf Caravan Park as an example, it would have been quite straightforward to design any new housing around existing trees, particularly if the focus was on just building affordable and social housing. Instead, nearly all are going. This, it seems, is ‘Placeshaping’, Bristol-style.

And this intransigence has resulted in damaging national press coverage – though note the lovely photo of the trees growing on the site.

Our objections to the proposals are set out here, but we are not the only ones…

Councillor Mark Wright’s experience

Councillor Mark Wright was the councillor for Hotwells and Harbourside until May 2021 when he stepped down.  Here he presents his experience of the many attempts he made to engage with the planners and Goram Homes at an early stage to try to secure as good an outcome as possible given that the caravan park was doomed to be closed. They came to nothing.

Mark writes:

Sept 2018

Mayor Rees announces that flats will be built on the site.

Dec 2018

I wrote to Cllr Paul Smith (Housing) “There are a number of very nice trees on the caravan park site that residents are already calling for saving (see attached Google 3D image). If done skilfully and at an early enough stage, many of the best trees could be embraced into the development in a way that greatly increases the value of the retail flats. If done too late or not at all, it’s likely that getting planning permission will become a battle over trees, which isn’t what anyone really wants. I think it would be a good demonstration of why Goram is a good thing if it sets the bar high on pre-app planning on things like this – it could really set an example to other developers. I understand that planning policy BCS9 requires the developer (i.e., BCC in this case) to do a tree constraints plan as early as possible – there is no need to wait until the actual plans start to form to do this. Can we get BCC to start this ASAP?” Cllr Smith replied, “I will have a word with officers”, but I got no further response.

I also wrote to the Council’s Arboricultural Officer, Matthew Bennett, asking for a tree assessment report to be done ASAP so that the best trees on the site could be saved and incorporated into the plans. I was interested in getting TPOs put on the best trees, but at that early stage Bennet replied to me: “Our aim through the planning process is to secure the best trees on site and mitigate the loss of those removed through the planning obligations SPD (BTRS). We cannot try and save every tree {…} a tree preservation order would not help the situation because full planning consent overrides a TPO”. That seemed reasonable so I concentrated on trying to get a tree report.

Jan 2019

I contacted officers again for an update but got no info.

Early Feb 2019

Planning Officer Paul Chick told me that no arboricultural tree report would be done until a pre-app was submitted, but no one knew when that would be.

Late Feb 2019

I raised the issue of trees on the site with Cllr Paul Smith and Steve Blake at Goram (Development manager); Cllr Smith said he had raised the issue of trees after my earlier contact, but I heard nothing more.

Jun 2019

I again raised the issue of trees on the site with Steve Blake at Goram and Matthew Bennett but got no response.

July 2019

A tree report was secretly written for the Council, but I wouldn’t see it until December 2020.

Dec 2019

The first concept images of the plans were released to the public. I wrote to Steve, Matthew, and Paul Smith again: “I note with interest the Council’s press release today indicating that a development partner has been selected for this housing site. There is even a picture of the proposed build. I presume this *must* mean that there has been enough preliminary work done to allow a tree constraints report for the site to be drawn up. Please can you assure me that the prime trees currently on the site are being designed into this new plan? A development such as this will be greatly enhanced in value by the intelligent and thoughtful retention of mature trees, and the Council’s reputation as a builder will be greatly enhanced as well, setting a higher bar in the city for other developers to follow…”

I got no responses…

Jan 2020

I wrote to Tim Bluff, a new contact at Goran Homes (taking over from Steve Blake, presumably) I had been given after badgering people. Bluff informed me that a tree report had in fact been done 6 months previously. I had never been told about it, despite asking multiple people for it for 13 months. I was told at this point the document wasn’t public and I couldn’t see it.

Feb 2020

There was a public *showing* of the plans. At this point it was clear that the plans were essentially almost “final” despite there having not been a single public engagement session of any kind, about anything. I declared publicly that I was concerned about both height and loss of trees.

Mar 2020

I discussed with the Bristol Tree Forum doing an informal assessment of the trees, but the Covid lock-down squashed that.

Apr 2020

The pre-app was published privately on the planning portal, but I couldn’t have access.

Early May 2020

The pre-app was made available to me, but not the public. It was clear that all trees on the site would be felled; all that would be saved was some of the boundary hedges. Again, by this point there had still been zero public engagement on any issue, only a showing of the images. The 10-month old Arboricultural report (i.e., July 2019) was still not available to anyone, including the Council’s own Arboricultural officer Matt Bennett, who wanted it too.

Late May 2020

I had a video meeting with Stephen Baker, Development manager at Goram (and Geoff Fox and Glynn Mutton) to discuss the plans. I made it clear I was unhappy with the height, the loss of all trees was a major problem, and the lack of any public input before publishing the plans was a big mistake and contrary to planning requirements on major plans. Steve said the trees were all being lost because the site had to be raised 2m to allow “active frontages” that comply with planning regs. I said that saving trees might be preferable to active frontages inside the site; I asked him who made this critical decision and when, as this was exactly the kind of thing the public should have fed into – at least if the decision had been informed by the public there would be some buy-in. He said he didn’t know and it had all happened before he joined the project. I made clear I was disappointed, but I really didn’t want to end up opposing the plans, and I hoped there would be a reduction in the height.

Oct 2020

Website for the plans went up.

Dec 2020

I finally received a copy of the July 2019 tree report – from the Bristol Tree Forum, not from the Council! It was clear that the decision to fell all trees on site had already been made earlier than July 2019.

Apr 2021

Full Planning app submitted, with no real changes since the pre-application stage. I lodged an objection “with heavy heart”.’

Valuing our urban trees – part I

At last, some good news: city trees have been given the same habitat and biodiversity value as their country cousins.
Or have they?

STOP PRESS

Since writing this blog, we have now responded to Defra’s Small Sites Metric (SSM) Consultation. It develops further our critique of the way that urban tree habitats are being undervalued. Perhaps urban trees are now the poor country cousin?

It is available here – Bristol Tree Forum response to the Small Sites Metric consultation


Our second blog dealing with Urban Tree habitat condition assessment is available here – Valuing our urban trees – part II.


Our third blog dealing with habitat selection is available here – Valuing our urban trees – part III.


The important contribution that urban trees (native and non-native) make to our cities has finally been recognised by Natural England, with their publication of Biodiversity Metric 3.0 (BNG 3.0) on 7 July. It states that:

Trees in urban areas can, under the right conditions, provide a large range of habitat opportunities, supporting lichens, bryophytes, invertebrates and birds. Tree planting in urban areas has for over two hundred years also introduced non-native species into towns and cities. In the context of biodiversity, native species are the preferred option. However, non-native tree species can contribute positively to biodiversity richness particularly in relation to providing a seasonal food source for nectar feeders and other invertebrates as well as supporting vertebrates that feed on species that are hosted by non-native trees. Examples are early and late flowering species of Prunus and aphids on varieties of Acer providing food for species higher up the food chain.

Trees in urban areas provide opportunistic sites for biodiversity to colonise and re-colonise, increasing connectivity and contributing to biodiversity critical mass between already established patches or sites. This is especially true where transport corridors are populated with mixed native species.

What’s an urban tree?

The new BNG 3.0 habitat category, urban tree, includes individual trees, lines of street trees and blocks of trees growing within the urban setting.

BM3.0 Guide – TABLE 7-1: Urban tree definitions

The previous urban tree habitat categories, woodland, orchard and street tree, which appeared in the beta test version of Biodiversity Metric 2.0 (BNG 2.0) have been discarded.

The urban tree habitat calculation has been set to ‘medium’ distinctiveness and ‘low’ difficulty for both habitat creation and enhancement. Urban trees are categorised into small, medium or large. Their condition may also be assessed as poor, moderate or good.

The problem with BNG 3.0

The three size bands set out in the table below are useful when creating new habitats or enhancing existing ones (for example, nursery-raised standards ready for planting have a stem diameter of around 30 cm and so are Medium). However, these bands are not useful for assessing the baseline habitat of existing urban trees.

This is the size table used in BNG 3.0:

BM3.0 Guide – TABLE 7-2: Urban tree size by girth and their area equivalent

NB: the second column of this table is wrongly labelled. It should read Girth (circumference) at Breast Height, not Diameter.

The RPA formula used is simple: RPA radius = 12 x DBH (Stem Diameter is also known as DBH – Diameter at Breast Height). This value is then used to calculate the RPA using the formula DBH = PI * RPAr^2.

Every application to develop land where trees will be affected should produce a BS:5837-compliant survey, called an Arboricultural Impact Assessment (AIA). This will report the stem diameters of all the trees growing on and around the site. The AIA also reports several other tree features including species, height, cardinal point canopy radii, condition, life stage and the BS:5837 category – a measure of the quality of the tree.

However, the BNG 3.0 table above provides no logical way of establishing whether a given surveyed tree with a stem diameter of, say, 15 cm or 40 cm – halfway between categories – is Small, Medium, or Large.

It would be better if the table gave ranges – say Small up to 10 cm, Medium 10-50 cm and Large 50 cm or more – but this has not been done. Also, doing this would distort the habitat calculation with all Small trees set to their upper range and all Large trees set to their lower range.

Our solution

Why use the table at all? It would be far simpler to calculate a tree’s baseline habitat area just by using the calculated RPA provided in the AIA. It would be better still to use its actual measured canopy area, which will have been reported in the AIA and thus be readily available.

In our view, RPA does not reflect the habitat value of a tree. All it does is use a formulaic approach to solving the problem of finding an acceptable way to protect trees. It bears little relationship to the habitat or biodiversity value of a tree.  It would be far better to calculate a tree’s canopy cover (TCC), the standard method of working out the value of a tree. Every AIA reports the canopy radii of the four cardinal compass points of each tree surveyed. These can be averaged and used to calculate TCC.

The Bristol One City Plan adopted TCC as the measure of tree planting success when it set the target to double TCC by 2046. TCC is a standard measure used by the various i-Tree tools and Forest Research uses it in its UK Ward Canopy Cover Map which used i-Tree Canopy. We used it to calculate the TCC of the city’s wards in our 2018 Bristol Tree Canopy Cover Survey and we are using it to update the new city-wide survey for 2021.

We made these observations when Natural England was consulting on its beta test version, but these seem to have been overlooked. We hope they now take note.

Some further thoughts

The introduction of the three new urban tree poor/moderate/good condition criteria, set out in detail in the BNG 3.0 Technical Supplement, will require all AIA surveys to include this data. Perhaps BS:5837 should be updated to require this to be recorded in the AIA.

Where tree surveys identify mixed urban tree conditions, the person undertaking the BNG 3.0 calculation will need to record more than one urban tree baseline habitat to capture this information.

BNG 2.0, which was only published as a beta test to allow for wider public consultation, is still being used by Bristol’s Local Planning Authority (LPA) for pending applications but needs to be abandoned. Pending applications which require a biodiversity net gain report should be required to recast their calculations using BNG 3.0 rather than still relying on BM2.0. This is particularly true for the Council’s own, direct applications such as the one pending for the Baltic Wharf Caravan Park.

Our initial analysis shows a significant net gain deficit when BNG 2.0 is used instead of BNG 3.0. This is especially true for urban street trees, which are significantly undervalued under BM2.0. Furthermore, the LPA is currently allowing applications which propose a zero net gain outcome, even though the Environment Bill (currently being considered in Parliament) will require a net gain of 10% above the baseline valuation.

Given that the Council has declared climate and ecological emergencies and aims to achieve carbon neutrality by 2030, it is surprising that developers continue to be allowed to present biodiversity net gain proposals that either undervalue biodiversity or offer no net gain whatsoever.

Conclusion

We welcome the publication of BNG 3.0, but its flaws need to be corrected.

As Natural England recognises in its recent blog – Biodiversity Metric 3.0 – a milestone moment for biodiversity net gain:

Publishing Biodiversity Metric 3.0 was a landmark moment for biodiversity net gain, it will become the metric used to calculate and evidence whether a project has achieved the biodiversity net gain requirements set out in the Environment Bill. Biodiversity Net Gain (BNG) is:

an approach to development, and/or land management, that leaves nature in a measurably better state than beforehand‘ …

Biodiversity Metric 3.0 ensures that:

all habitats, from street trees to woodlands, green roofs to grasslands are recorded, scored and valued for their importance for wildlife. At the same time, it provides an evidence-based, transparent, consistent and easy to use way of ensuring that nature is considered within the design of developments and in land management practice, leaving nature in a better place than it was before, benefitting wildlife, people and places.

Bristol City Council’s declaration of climate and ecological emergencies and its commitment to achieve carbon neutrality by 2030 means that it needs now to ensure that the latest, most accurate biodiversity net gain calculations are part of all pending and future planning applications.

Consultation on proposed changes to NPPF and the National Model Design Code

Individual planning decisions, development designs and local and national plans for development all impact local communities. We urge the Ministry of Housing Communities and Local Government to consider our views on the design codes and to continue to engage communities and groups such as ours in local planning decisions.

Here are our detailed responses to the consultation.


The changes proposed in Chapter 2 – Achieving sustainable development

Paragraph 7 – We agree with the introduction of the 17 Global Goals for Sustainable Development. These have been adopted by Bristol as part of its One City Plan so their adoption in the NPPF will be essential for ensuring that the city’s core planning policies are aligned with its wider goals.

Paragraph 8 states:

‘Achieving sustainable development means that the planning system has three overarching objectives, which are interdependent and need to be pursued in mutually supportive ways (so that opportunities can be taken to secure net gains across each of the different objectives).’

We would also like it to be made as clear as possible that these three overarching objectives are indeed ‘interdependent and need to be pursued in mutually supportive’ ways so that no one objective takes precedence over the others, as has been our experience with a number of recent planning decisions made in Bristol.

We propose that the paragraph amended to read: ‘Achieving sustainable development means that the planning system has three overarching objectives, which are interdependent and need to be pursued in mutually supportive ways so that no one objective is treated as having precedence over the others (so that opportunities can be taken to secure net gains across each of the different objectives)’

Paragraph 11 a) – We also endorse the proposed change that ‘all plans should promote a sustainable pattern of development that seeks to: meet the development needs of their area; align growth and infrastructure; improve the environment; mitigate climate change (including by making effective use of land in urban areas) and adapt to its effects’. Trees are an important component of this, particularly where green space is limited.


The changes proposed in Chapter 3 – Plan making

Paragraph 22 – We agree that ‘where larger-scale development such as new settlements form part of the strategy for the area, policies should be set within a vision that looks further ahead (at least 30 years), to take into account the likely timescale for delivery’. Too often, trees that were planted where a site was last developed (often only a few years before) are sacrificed to the short-term goals of the new proposal. Setting longer-term goals can help prevent this.


Proposed changes to Chapter 4 – Decision making

Paragraph 53 – Of the two options offered[1], we prefer the second – ‘where they relate to change of use to residential, be limited to situations where this is necessary in order to protect an interest of national significance’. In our view, the phrase ‘wholly unacceptable adverse impacts is open to too wide an interpretation which may not be rooted in wider national goals.

We agree that that Article 4 directions should be restricted to the smallest geographical area possible. 


The changes proposed in Chapter 8 – Promoting healthy and safe communities

We welcome many of the additions and changes proposed, including the recognition that a well-connected network of high-quality, open, green and wooded spaces is important for both our mental and physical health.

Paragraph 97 – We believe that access to a network of high-quality open spaces and opportunities for sport and physical activity ‘should always deliver wider benefits for nature and efforts to address climate change.


The changes proposed in Chapter 12 – Achieving well-designed places

Paragraph 128 – We agree that all guides and codes should be based on effective community engagement and reflect local aspirations for the development of their area.

Meaningful community engagement at all stages of the planning process is essential if the changes proposed are to succeed. Too often, communities are not asked to engage with planning proposals until they are published and the formal approval process has started. By this time most of the key decisions have been agreed between the developer and the planner and it is too late for any meaningful consultation with the wider community.

Paragraph 130 – We welcome the introduction of this new paragraph:

‘Trees make an important contribution to the character and quality of urban environments, and can also help mitigate and adapt to climate change. Planning policies and decisions should ensure that new streets are tree-lined, that opportunities are taken to incorporate trees elsewhere in developments (such as community orchards), that appropriate measures are in place to secure the long-term maintenance of newly-planted trees, and that existing trees are retained wherever possible. Applicants and local planning authorities should work with local highways officers and tree officers to ensure that the right trees are planted in the right places, and solutions are found that are compatible with highways standards and the needs of different users.’

We must learn to value our urban trees and woods growing in Bristol (and in other cities), so we were pleased to see this addition with the ambition to ensure that all new streets are treelined, but city-wide planning involving existing streets and road networks must also make space for new tree planting in the design process as well as ensuring that existing trees are retained.

Generally, planning requirements must be tightened to ensure that existing trees are retained. Only in exceptional cases where there are clear, justifiable and compelling reasons to do so should trees be removed. In all cases the cascading principles of the Mitigation Hierarchy must be applied and, where there is no option but to remove a tree, the loss of habitat and biodiversity that the tree provided must be compensated for by an adequate tree replacement calculation such as that used in the Biodiversity Metric calculation.

We agree that ‘development that is not well designed should be refused (paragraph 133). Designs that fail to make provision for preserving existing trees and providing new trees are not, in our view, well-designed and so should be refused.


The changes proposed in Chapter 13 – Protecting Green belt Land

New Paragraph 149 – We propose the deletion of this text, which is too general and open to interpretation. Certain other forms of development are also ‘not inappropriate in the Green Belt provided it preserves its openness and does not conflict with the purposes of including land within it’.

In Bristol there are just over 596 hectares of Green Belt left within the metropolitan boundary, mostly confined to the few remaining green margins of the city. The last draft of the Local Plan proposed the removal of some 50 hectares for development. Already parts of the Green Belt are disappearing without any hint that this ‘preserves its openness and does not conflict with the purposes of including land within it’. Little by little, development by development, Green Belt land is being lost.


The changes proposed in Chapter 14 – Meeting the challenge of climate change, flooding and coastal change

Paragraph 160 c) – Tree preservation and the planting of new trees are key elements of ‘using opportunities provided by new development and improvements in green and other infrastructure to reduce the causes and impacts of flooding, (making as much use as possible of natural flood management techniques as part of an integrated approach to flood risk management)’ We would like to see text added that states this.


The changes proposed in Chapter 15 – Conserving and enhancing the natural environment

Paragraph 179 d) – This states that ‘development whose primary objective is to conserve or enhance biodiversity should be supported; while opportunities to improve biodiversity in and around other developments should be pursued as an integral part of their design, especially where this can secure measurable net gains for biodiversity and enhance public access to nature’.

It is essential that core planning policies mandate a standard metric for measuring baseline and created and enhanced habitat biodiversity proposals. Developers must be obliged to provide a Net Gain calculation when submitting their proposals. The latest version of the Biodiversity Metric Is designed for this purpose and should be mandated for all new planning proposals. All planning permissions should require the delivery of Biodiversity Net Gain plans of at least 10%.


We would be grateful for your views on the National Model Design Code, in terms of a) the content of the guidance b) the application and use of the guidance c) the approach to community engagement

The design codes must deliver three key things to ensure that new developments always provide access to high-quality, local green space and to trees, with all the benefits these provide for communities.


  • Protect and integrate existing trees  

New developments must incorporate and protect existing trees from the outset. There must be a presumption that the design will accommodate the existing trees growing on and around the site – especially those growing around the edges of sites. Designs should consider the long-term health of trees in and adjacent to new developments and aim to promote this. This will include providing adequate buffers for ancient, veteran and self-seeded trees and woods.

  • Increase canopy cover  

New developments must have a target of providing a combined minimum of 30% canopy cover on and off site. This should be made up of a mix of tree-lined streets, community woodlands, Tiny Forests, parks and gardens. Where tree provision will be made off site, the cost of providing, planting and caring for the trees on a long-term basis should be funded by the developer and incorporated into tree-specific S106 agreements (T&CPA 1990). Where possible, trees should be native and sourced and grown in the UK. Trees that will become large and are long-lived should be selected where possible.

  • Ensure trees thrive for the long term  
<p value="<amp-fit-text layout="fixed-height" min-font-size="6" max-font-size="72" height="80">Local authorities must be properly resourced so that they can implement design codes and other areas of planning policy. Resource needs to be available for decisions to be enforced and to ensure long-term management of trees by tree officers.Local authorities must be properly resourced so that they can implement design codes and other areas of planning policy. Resource needs to be available for decisions to be enforced and to ensure long-term management of trees by tree officers.
  • Community engagement

As we have already noted, meaningful community engagement is essential if communities are going to consider that they ‘own’ planning decisions rather than having them imposed on them.

We have published a paper on the issue as it relates to consultation on the management of trees which we commend to you: ‘Community engagement in urban tree management decisions: the Bristol case study’.

3 March 2021

You can download a copy of our submission here.

Here are copies of the draft National Planning Policy Framework and National Model Design Code.

The consultation closes on 27 March 2021 and can be accessed here – National Planning Policy Framework and National Model Design Code: Consultation proposals.


[1]  ‘a) where they relate to change of use to residential, be limited to situations where this is essential to avoid wholly unacceptable adverse impactsorb) where they relate to change of use to residential, be limited to situations where this is necessary in order to protect an interest of national significance’.

BTF 2020 Newsletter

Because we could not hold our AGM this year, we have decided to publish a number of articles highlighting issues that have been prominent over the past year. We hope you find them of interest.

Sadly, it has not been possible to hold our annual AGM this year, so we have postponed it until next Spring. Subject to the state of any COVID 19 restrictions against us meeting, we will let you know when we have been able to find a new date as soon as we can.

In the meantime, we have decided to publish a number of articles highlighting issues that have been prominent over the past year. We hope you find them of interest.

We wish all our followers a very happy holiday season and all the very best for the New Year.


In defence of Bristol’s trees – Mark Ashdown

Why are we felling so many trees in Bristol when the city’s stated aim is to double tree canopy cover by 2046? To achieve this aim, we will need to stop felling existing trees, failing to replace those that have to be felled trees AND see at least a five-fold increase in our current tree-planting rate!


Miyawaki or Tiny forests – Chris Wallace

Miyawaki or Tiny Forests are a promising approach to rewilding urban areas and we look forward to being involved in future schemes. However their contribution to overall tree canopy is limited by their size.


Don’t Stop The (Christmas) Rot – In praise of Ivy Guest Editor, Nick Gates, Naturalist

There is a weird craze amongst a certain type of well-meaning nature lover. It involves taking an axe, leatherman or small saw, and severing limbs. Not at random, but of one of our favourite and most important Christmas plants. Ivy.


On the Verge – Planting for the future Guest Editor, Nick Haigh

The A4320 Bike Path Verge is a tree planting initiative between Bristol’s Lawrence Hill roundabout and Stapleton road; currently a bare stretch of grass, void of plants and animals, it will soon be turned into a wildlife, carbon-capturing haven, with thanks to support from the Bristol Tree Forum.


Bristol City Council’s Tree Management Policy – has it changed, or did we misunderstand it all along? Stephanie French

Why does Bristol City Council have one standard when it comes to protecting its own trees, but another standard when it comes to trees protected with a TPO or growing in a Conservation Area?


Dealing with Ash Die Back disease Guest Editor, Victoria Stanfield Cert. Arb & For

It was shocking to see the prevalence of the disease in our area when the trees were in full leaf this Summer, a large number of the trees which had been showing some sign of the disease in 2019, had deteriorated dramatically over the Winter months and come back into leaf with less than 50% of their canopy cover.


Trees and Planning: Artists’ Impressions and Heritage Statements Stephanie French & Vassili Papastavrou

Plans with delightful illustrations of tree-filled spaces around new developments, either showing existing trees retained or new trees planted, are so often a ‘misdirection’, drawn in to make you think that everything will be alright and is acceptable, and that it doesn’t matter really. Please don’t be fooled. You need to read the detail.


The Morley Square arboretum Chris Wallace

Morley Square is the only privately owned square in Bishopston. The deeds of the 28 houses around the square, including ours, state that the house owners have the rights of access to the square and the responsibility for its maintenance. One of our main concerns are the trees, some impressively large, mapped here on BristolTrees. Although only covering half an acre, the square contains 29 species of tree, a minor arboretum.


New Developments should be built around existing trees Vassili Papastavrou

We always see glib promises that more trees will be planted than are removed, with the insinuation that the environment will be better afterwards. In our experience, replanting often fails or, if it does survive, produces meagre results, and take years to replace what is lost, assuming it ever does. It is perfectly possible to build around existing trees.


Our 2020 Blogs


Shocking treatment of Lower Ashley Road trees shows urgent need for Bristol Planning rethink – January 18, 2020


Council no longer manages trees on educational sites – Part II – January 27, 2020


The trees at Stoke Lodge Park and Playing Fields – a letter to the Council -February 5, 2020


A Manifesto for protecting Bristol’s existing Urban Forest – February 13, 2020


In Defence of Dead Wood – February 21, 2020


Congratulations BCC on its successful Defra Urban Tree Challenge Fund bid! -February 26, 2020


Tree replacement and carbon neutrality – March 31, 2020


A letter to our Councillors – May 4, 2020


Bristol City Development – Where did all the Green go? – July 9, 2020


Wales and West Utilities helps to protect Bristol’s precious trees – July 10, 2020


Trees valued at over £4.6m are under threat at Bonnington Walk, Lockleaze – July 18, 2020


Bristol Tree Forum tree planting campaign – free Oak saplings available for planting – October 26, 2020


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