Heinnie Haynes, Barry, south wales, if you call ahead, not a shop, but you can view things sometimes.
Having said that, what makes something a "bushcraft" shop? When you look at what Tamarack sells, a great deal of it is just good quality camping gear. They mix that with some military style equipment, some leather and canvas stuff, and knives and axes.
Bushcraft Labs in Cambridge has a good supply. It's technically not a brick and mortar, but you can go to thier location. Has a decent selection on-hand, but it is a small shop. Bring cash since the only other way to pay is online, which includes shipping cost. www.bushcraftlab.co.uk