There are two types of Longbow in the UK. There is the victorian longbow (aka Butt Bow) and the medieval warbow.
Butt bows have a raised mid section and have draw weights upto 80# roughly. They have a stiff mid section (more wood) and the last 6" or so of each limb does not bend much either. They also have a grip.
Warbows are full compass (bend the entire length of the bow) and the draw weights start at 80# and weights of 180# have been shot.
And just because I've got it today and still beaming about it:
http://www.archery-interchange.com/f...arge-pics.html
The best woods, IMO for longbows is bamboo and osage orange for victorian butt bows and osage orange combination bows/yew for warbows.
Kae.