large pieces of wood basswood, ash, alder,swamp ash,Mahogany, Walnut , hardwood wanted enough to make a bass guitar body

Craft Supplies (I think I've got the name right) have loads of wood, fretboards, and all sorts of things to make guitars. They're in Bradwell, but I think they have a website too.

Celia

Try Ecclesall Woods Saw Mill on Abbey Lane maybe. Loads of artists are based there who are all timber based. They'll at least know where to source it.