hi mate, im 5 miles south of Dorking, so in the area.
the best LFS's around are:
Dorking Discount aquatics - family run, decent prices, stock basic aquafleur plants at good prices (crypts JF, anubias, and stems) got a marine section as well
The crawley MA: isnt to bad, its located on the ring road that goes around gatwick airport. Fish seemed okay (i bought 6 C.trilineatus from there and they are still going strong) plants seemed pretty decent. some HUGE echinodorus and anubias in there.
if you need some help send me a PM.
(avoid charlwood aquatics like the plague, shocking conditions for fish and most look diseased)