Otherwise, it'll probably be Canterbury to visit, but I'm sure some nice shops can be found there as well, right?
Well, I thought I'll read this thread, because it's UK based, finish my coffee and head off to work. Well, I can be of sort of help too.
Canterbury isn't a massive city but it's got some good kooky shops. There is a camera shop just outside of the city centre:
http://www.cant-cameras.demon.co.uk/
If you keep on walking down the central street through the city (St. Georges Street, the old A2) and out the other end go through the subway to the otherside of the ring road and keep going, it's probably signed Dover. About 300yds past the Odeon cinema on the right is an Aldi supermarket, turn in just before it and there's a small precinct. They're tucked away in there.
They had all manner of stuff, digital, film, 35mm, medium format, paper, darkroom stuff. Very helpful. Sorted out my poor Ultron 35mm after 150 miles of wandering (Well, tightened the screws.)
If you get to a cross-roads signed for Sandwich to the left, you've gone too far.
There might be other shops but I didn't spot them (apart from Jessops which are 2-a-penny but they do sell a half reasonable range of film, and Boots may have a stash of Kodachrome if that's your thing)
Vicky