Cars for less than £1000 rarely are worth it, they are valued to that amount usually because there is something wrong with them so you would probably be wasting your money when you take it to the garage...
Off the top of my head I know I have a friend selling an black MGB for about £2500, but it is an old car, classy I suppose but if maintenance isn't your thing then probably not worth it, not to mention he lives just south of Manchester and I think you live quite a way away from there right?