Ruislip Woods

Ruislip Woods is a Site of Special Scientific Interest[1][2] and national nature reserve covering 726 acres (294 ha) in the London Borough of Hillingdon. The woods became the first national nature reserve in an urban area of England in May 1997,[4] receiving the Green Flag Award in 2006.[5] Ruislip Local Nature Reserve at TQ 090 899 is part of the national nature reserve

More information on the Wikipedia page.