In reply to thebabyrhino:
Unfortunately there's not much in your SRT kit of use in climbing (to begin with at least) though you could get away with using the harness for a while. The south of England is a big place. Do you have a particular type of climbing or geographical area you're interested in? Either way, your best bet if you don't know other climbers is to find and join your local club. The BMC keeps a directory. Good luck.
jk