If you were going to Birmingham you'd want to check out Classical Guitar Centre Ltd, Birmingham.

Or even further afield:

Barry Mason's Spanish Guitar Centre (Cranbourn St, nr. Leicester Sq. Stn, London)

The London Guitar Studio. 62 Duke Street, off Oxford Street 0207 493 1157 (web site was www.londonguitarstudio.com, but is currently listed as suspended!).

(These 2 are close enough to walk between them - about 20 mins).

Or further still:

Bristol Spanish Guitar Centre

I haven't checked if any of these do mail order, but it should say on the web sites.

Mick