One Tree Hill is a defining feature of Honor Oak, mostly in London Borough of Southwark but with parts also in the London Borough of Lewisham. It includes a 7 hectare public park, local nature reserve and Site of Borough Importance for Nature Conservation, Grade 1, [1] which is owned and managed by Southwark Council.[2] Its name, and that of the Honor Oak area, derive from the Oak of Honor, a tree on the hill which marked the southern boundary of the Norman Honour of Gloucester.[3]
One Tree Hill was once a part of a much larger landscape called the Great North Wood.[3] The London Wildlife Trust is currently working with Southwark Council and the Friends of One Tree Hill to improve the site for wildlife, as a part of its Great North Wood Project.