I'd be interested to hear of wood suppliers based either in the UK or willing to ship to the UK. I'm thinking of body/neck blanks, fretboards, drop tops etc. It would be great to find some suppliers of UK-grown wood suitable for building instruments. I'd also be interested to see if anyone uses suppliers outside of the UK. For example getting wood shipped in direct from the US or Canada. There doesn't seem to be any mention of wood in the Suppliers sticky so I thought I would give this ago.
To start the process off, I recommend:
David Dyke
http://www.luthierssupplies.co.uk/
I use David pretty much exclusively at the moment. I've found him to be very reliable to deal with over the phone and sends out wood that is carefully packaged and graded. I also visited once to look though his stock personally, and he's an absolute gent. The only disadvantage is that his website doesn't show pictures of individual pieces of wood, so for exotic drop tops it's best to visit. Located in East Sussex.