Habitat survey and evaluation for nature conservation in London

The procedures adopted by the London Ecology Unit in developing a nature conservation strategy for London are described. Habitat survey was undertaken over 1,800 sites totalling 300 km2 which is about 20% of the area of Greater London. The habitat classification contains 35 categories which were mapped at 1:10,000 scale. Together with information on species this provides a database on London’s ecology. Criteria for conservation evaluation are listed and the categories of site protection are described. The implementation process is explained and it is emphasised that this procedure is now well-established as part of the statutory planning system in London. Reasons for successful adoption of this approach in London are considered.