Denham Lock Wood

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Map showing location of Denham Lock Wood in Colne Valley Park
Path in Denham Lock Wood
Carp Lake from Denham Lock Wood

Denham Lock Wood is a 6.3 hectare biological Site of Special Scientific Interest next to the Grand Union Canal, and near Denham in the London Borough of Hillingdon. It was notified in 1986 and is managed by the London Wildlife Trust on behalf of Hillingdon Council. It lies within the Colne Valley Regional Park[1] and its grid reference is TQ055863.

It is a poorly drained wet woodland and fen site which is skirted by the Frays River. The main trees are alder and crack willow in the wetter areas, and elsewhere oak and ash with a shrub layer of hazel. In winter wildfowl are visible and in spring many flower species. Invertebrates include red cardinal beetles, banded demoiselles and the rare and protected Desmoulin's whorl snail.[2][3][4] The balsam carpet moth was added to the list of British species when it was found at the Wood in 1955, and it is only known at one other site in Britain.[5]

Access is by a footbridge across Frays River from Frays Farm Meadows, which is also an SSSI managed by the London Wildlife Trust, south of the Wood. Access to the Meadows is by a stile on the east side of the Grand Union Canal at Denham Lock.


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Coordinates: 51°33′58″N 0°28′44″W / 51.566°N 0.479°W / 51.566; -0.479