Heya
i got a pm and havn't been on the site for a long time
I used to be joint captain of 759, although am not really involved any more
They are based in Cambridge, famous for the university etc, and is about 50 miles north of london, and sort of in between london and norwhich.
759's website is
www.systemetric.org
i've sent you a pm with an email address for them.
Hope this helps.
(also, if you hear of any teams further north, like near nottingham, i might be interested, i know theres one in doncaster but its still a 2 hour trek )