According to the Wildlife Trust there are approximately 240,000 hectares of lowland mixed deciduous woodland in the UK. However, this is only 1-2% of its original area and has declined 40% since 1935. This is the result of clearance for development and agriculture. Some ancient woodland was felled after the 2nd World War to provide building materials. This was replanted by the Forestry Commission, as conifer woodland, which has had a negative impact on wildlife.