im in oxford, so abit futher for you.
http://cgi.ebay.co.uk/SUBARU-IMPREZA-WRX-5-SPEED-TURBO-EXEDY-CLUTCH-KIT-/260687572525?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3cb230ae2d
this clutch witch is what they will be supplying is a OEM exedy clutch basically, plus fitting, could do for £325.