Thanks everyone.
Steve - the tax expired at the end of October so I will have to start it again from the beginning of November I guess.
In terms of other 'niggles', it is missing a front headlight washer, there are a couple of very minor scrapes on the bottom edges of the bumpers (nothing serious and nothing £150 wouldn't fix in a body shop), the cambelt needs changing, there is a very small bit of damage to the back of the driver's seat (tiny) and it will need new tyres shortly.
On the positives, the vast majority of the bodywork is beautiful and unmarked, no rust anywhere, MOT til May and everything works. Wing mirrors show no signs of fading, no lamination in the windscreen, no knocks or rattles that I could hear and a nice smooth drive. I will get Miles, my mechanic, to check it over tomorrow but it generally seems ok.
Also on the good news front, I got it for £1000 which I think is a good price for a 1999 model in good condition.