I'm at Surrey uni and for Engineering, we are one of the best. If nightlife is the reason you're going to uni, go someplace else but if you're looking to have a great education from a university that is growing to be one of the most respected in the UK not only for engineering, but also in general, whilst also having a decent nightlife, come to Surrey. The nightlife is there if you want it, just there isn't 20/30 different clubs to go to like Nottingham or Leeds.
The amount of times I've gone to interviews and people have been impressed that I go to Surrey, you won't regret it.