The Guardian today has a lovely article on what they deem the ten best second-hand bookshops in Britain. Their list is:

Barter Books, Alnwick, Northumberland
The Book Shop, Wigtown, Dumfries and Galloway
Scriveners, Buxton, Derbyshire
Bath Old Books, Bath (no website)
The Haunted Bookshop, Cambridge
Any Amount of Books, Charing Cross Road, London
Westwood Books, Sedburgh, Cumbria
Wenlock Books, Much Wenlock, Shropshire
Scarthin Books, [...]