Sutton nature reserve plans face scrutiny over delays and habitat changes

Decades-old plans to convert Beddington Farmlands, a former landfill site in South London, into a nature reserve are facing renewed debate. Sutton Council's Planning Committee is scheduled to decide on significantly altered restoration proposals next Wednesday, September 2. The site, comparable in size to Hyde Park, has been the subject of restoration efforts for 30 years, with initial proposals for wetland habitats dating back almost two decades.

Habitat and Biodiversity Concerns

A key change in the revised proposal involves removing a planned 12.60-hectare area of rare acid grassland and lowland heath. The site owner, Valencia Waste Management, proposes to substitute this with 'species-rich' lowland meadowland. This adjustment stems from soil tests indicating the landfill soil is highly alkaline, making acid grassland unviable without chemical treatment. Council officers have also noted that acidifying the soil could potentially release harmful leachates into the nearby River Wandle.

Local groups, including the Hackbridge and Beddington Corner Neighbourhood Development Group, have expressed dissatisfaction, stating the abandonment of acid grassland offers substantial cost savings to Valencia without any offered financial mitigation or off-site habitat compensation. Furthermore, objectors argue that the Biodiversity Net Gain calculation, which Valencia claims will exceed 30%, uses the site's current degraded condition as a baseline. This approach, they contend, effectively rewards the owner for past delays in completing the restoration.

The London Wildlife Trust and Beddington Farmlands Bird Group are among those arguing that the Biodiversity Net Gain should be measured against an earlier ecological baseline from 1995 or 1998. Sutton's Senior Biodiversity Officer acknowledged the site's "long history of ecological under-delivery" but stated that recreating a 30-year-old baseline would be legally and practically impossible. Officers maintain that using the current baseline is the only legally sound method to secure immediate, enforceable habitat improvements.

Public Access and Financial Security

The balance between public access and wildlife conservation has also proved contentious. The new Access Strategy proposes year-round access along the western boundary and around the southern lake. However, other routes would have seasonally controlled access via automatic and lockable gates to protect nesting birds, including lapwings. Campaigners have objected to a proposed 2.30pm winter closure on some routes, deeming it too early compared to other reserves. Conversely, the Beddington Farmlands Bird Group has raised concerns that increased public access, dog walking, and angling could disturb nesting birds, emphasising that wildlife conservation should be the primary focus.

Local campaigners are also frustrated by the lack of progress, despite £2.34 million being held as financial security for the restoration. This sum is held in a cash collateral trust. The council currently lacks the legal authority to access these funds and undertake the work itself should Valencia default on its obligations. The recommended approval is contingent on a new Section 106 legal agreement by March 2027. This agreement would enable the council to secure measures to mitigate the development's impact and grant powers to access the funds if Valencia fails to meet its commitments. It would also introduce staged, enforceable restoration milestones instead of a single completion deadline. Missing a milestone would trigger default provisions, and a detailed cost assessment would require Valencia to increase the bond if final restoration costs exceed the current £2.33 million provision.

If councillors approve the plans next week, it would represent a significant but contested step for the long-delayed nature reserve. The revised timetable suggests final restoration would be completed by 2029.