Trees as biomass fuel

My current project is about increasing the use of biomass fuel in the UK so I was intrigued by this site, which has a lot of useful knowledge about the qualities of wood and legend and lore connected with trees and timber:

The-Tree.org.uk
'a resource and meeting place for tree lovers and green activists:
Woodland and forest knowledge, forest ecology, guide to British trees, tree-medicine, traditions, cultivation and crafts, eco-spirituality, Tree Community Message Boards, news and campaigns for conservation and sustainability.'