I believe it's a Diablo, but I'm not sure. Only decals are the Made in England sticker, "Plasma welded titanium" sticker, and headtube Dyna Tech sticker.
Welded TI frame (not bonded), 1-1/8 threadless cromo U.G.L.I Fork.
STX-SE groupset, looks like it was converted from cantis to v-brakes at...