For work reasons, I was looking at the National Energy Foundation site, and noticed that they have a wood fuel subsection. This includes a listing of people with wood for disposal or sale, and some of the stuff offered sounded as though it might be too good to use just as fuel!
Worth a look at:-
http://www.nef.org.uk/logpile/noticeboard.htm
Worth a look at:-
http://www.nef.org.uk/logpile/noticeboard.htm