May I suggest you drop into
http://wearebikehaus.co.uk/ (not that far from you) and have a chat with Andy and Jon regarding ADR Carbon wheelsets (afaik they have some in and if they don't they should be able to arrange to have some in to view at fairly short notice), or contact ADR directly via
http://adrcarbon.com/
Send them an email to ask what options and the prices. Solid outfit, I know how much testing they put the kit through before offering it for sale, I've also ridden their kit and I would vouch for them (they are even so helpful as to have made me custom carbon components from scratch to help solve a problem)!
Not to mention a few pro's (Alex Dowsett, Andy Tennant, James Gullen, Steve Lampier) and loads of top domestic riders are using their frames, wheels and bars. The prices are not quite as low as buying from farsports etc but they are UK based and still substantially cheaper than most of the competition!