This post is mainly as a massive thanks to everyone on here who I've bought stuff off over the years. I finally got a camera, and following a little accident in Salford with my old bike have re-built this frame with some new (and second-hand) bits.
A list of parts, and where I got them.
The GT Arrowhead frame was bought from here in 2004 from a guy called dammitamit (don't think he posts anymore).
I got the Rockshox Tora SL forks a few days ago from Dark Side (many thanks).
The XT/Mavic wheels from CarlThomas,
the LX disc brakes from bri-72,
the Deore XT front derailleur from Dylan08,
the On-One Inbred saddle from gonetothehills,
The Kenda Stick-E tyres I got from James Garbett in 2006
and the DMR V-8 peddles I got from the classifieds in 2007.
Most other stuff from CRC. Of note, the frame is now disc compatible thanks to the A2Z frame disc mount from woolyhatshop.
The bars need cutting down a bit, but didn't fancy doing that just yet.