In reply to idiotproof (Buxton MC): The best deal on the planet is Go Outdoors selling some WC Helium quickdraws at silly prices but online ordering isn't possible, but you'll need to be quick if you're close enough to a store:
15cm
http://www.gooutdoors.co.uk/nitro-15cm-quickdraw-p162495 stock at Colchester, Gloucester, Stockport or Wakefield
10cm
http://www.gooutdoors.co.uk/helium-10cm-quickdraw-p162489 stock at Edgeware Road, Erdington, Manchester, Wakefield, Warrington
Online, the best deals I've see are the V12 Wildwires already mentioned and WC Nitro quickdraws from Rock&Run.
Rock&Run are doing 3 quickdraws for £27
http://www.rockrun.com/products/Wild-Country-Nitro-Quickdraw-3%252dPack.htm...
In addition you could probably get Go Outdoor who stock 15cm versions to undercut the £9.50 each Rock&Run are selling them at to bring them down to 8.55 per quickdraw:
http://www.rockrun.com/products/Wild-Country-Nitro-Quickdraw-15cm.html
and
http://www.gooutdoors.co.uk/nitro-15cm-quickdraw-p162495
HTH