Thanks for the ideas. After some quick searches of the site the frame looks very much like this 93 Raleigh Torus Ti, including the solid rear dropouts.
Thanks for all the help. Sadly the bike isn't mine, it was donated to the community bike workshop I volunteer at. It will probably be split and the frame sold on ebay, with all the other bits (mostly STX RC) going to build up another frame. It deserves a decent build and better kit than STX.