I'd seriously question the value of an events management degree, on the grounds that
a) it's very specific, and this will mean that you will find it harder to change career direction if decide you don't want to work in that sector in the future
b) you can get into events management without an events management degree - this is one area in which work experience will be key
Whilst I can't claim to be familiar with the relative merits of each degree at each uni, what I can say is that Surrey and Kent have very good reputations, and Plymouth is one of the better ex-polys out there.