Well, they all have very good reputations in the UK, but in my opinion Nottingham and Bristol are the best rated. Look at the websites, specifically at the aerospace engineering section, to see which course you would most prefer and which university appears to be best equipped to do the course. I.e. do they have the correct equipment? how good is their research?
As far as campuses go I've seen Nottingham and Southampton; with friends having visited Sheffield and Bristol. Southampton is not as nice as Nottingham- it is campus but there is much less open space at Southampton than at Nottingham and the buildings are older. Also, from what I've heard Sheffield can be a little 'run down' in places. People have said that Bristol is nice but I haven't seen it myself so I can't really comment.
Basically as far as reputations and campus's go, Bristol and Nottingham are the best. However it also depends on the nature of the course and which you would prefer to do.