So I went back and had a look again.
Seems to be a 1996 from the serial number:
My jets have cooled slightly. It really is in a ratty state (not in a cool relic'ed way, just ratty).
Frets 1 to about 5 have got serious grooves in them, so some new frets or new neck is a must.
I plugged it into a little 10watt marshall they had in the store, and it sounded really weak/thin.
In short it seems that it's going to need a bit more cash thrown at it to get it playable than I'd like...
I'd really like a tele, but if I'm going to be replacing the neck and other hardware I might as well start with scratch.