RAF Bentley Priory was a non-flying Royal Air Force station near Stanmore in the London Borough of Harrow. It was famous as the headquarters of Fighter Command during the Battle of Britain and the Second World War. The RAF Bentley Priory site includes a Grade II* listed Officers' Mess and Italian Gardens. These, together with the park are designated a Registered Garden Grade II. The land south of the house is the Bentley Priory Nature Reserve, a Site of Special Scientific Interest maintained by Harrow Heritage Trust.