Well one thing I'm sure of, there's a big community out there !
Thanks for all the pointers, there looks to be a lot more on-line than I'd first imagined - I'm one of those misers that uses an old dial-up, quickly.
I'm already thinking about flooding the Bristol area with my own caches and now I'm determined that the first cache I place will have a stamp in it.
Cheers and Happy Hunting !