I recognise that jetty
It's in a park near Leighton Buzzard. Stockgrove I think.
( tobypowell Ptarmigan!, Tue 10 Apr 2007, 21:05, archived)

You're correct...
Its the old dock in Stockgrove Park, right by Heath and Reach.
(Chunkmiester Isn't happy with all this "not smoking" nonsense., Wed 11 Apr 2007, 0:12, archived)