Frays Farm Meadows | London Wildlife TrustOne of the finest examples of rare wet grazing meadows in London and part-designated Site of Special Scientific Interest (SSSI), near Denham, Hillingdon.One of the finest examples of rare wet grazing meadows in London and part-designated Site of Special Scientific Interest (SSSI), near Denham, Hillingdon. About the reserve The wildlife-rich Frays River in west London's Colne Valley meanders through Frays https://www.wildlondon.org.uk/nature-reserves/frays-farm-meadows