This is the link for the Edinburgh Quilt Show. Be warned - we do things on a MUCH smaller scale here! The whole show is about the size of a gym hall, lol. Expect to pay $22-$23 per metre (39"). You might get a little cheaper in England. Most of the fabrics will be imported from the U.S.
You don't say how far north you're visiting, but if you're up this way, the one in Aberdeen (as already mentioned) is owned by a lady from Seattle. They also run a variety of classes and drop-ins. Machines can be hired (at no cost) if you fancied meeting some Scottish quilters