@Spankk
Well usually students from each different uni tend to cluster around different areas that are close to the universities themselves. So far from what I've seen for example UCL students hit the Caledonian road area, Queen Mary students went around Liverpool Str., Aldgate East & Stratford, I've seen Brunnel students sticking around Uxbridge, CAS students around Angel/Farringdon, I've met King's students around Charing Cross and LSE students yet again around Farringdon. I can't really say that any of these areas is representative of a student population but you get my point. It always boils down to budgeting, I've met AA students living in Chalk Farm renting places for ridiculous amounts, then again they are AA students. I have even seen Westminster & St. Martins students living in the best of places around South Kensington or Sloane Square (fml, don't ask me how bad students always somehow got money).
Apart from those I'd say that generally young people like a lot the Brick Lane area (Aldgate East), the Hackney/Dalston area, and everything round Angel, Old Street, , Farringdon, Barbican.
With Imperial students I'd say your best bet is around Imperial Wharf and Clapham Junction, since they are the most affordable sort of ok/better areas close to the university. If you lower your standards a bit I'd say you could look around Hammersmith, Shepherd's Bush, Wood Lane, but there areas remind me of the dreadful ghetto style areas I've been living over the past 3 years in East London. (Oh yeah btw, please for your own sake avoid anything in east London, that is anything further that Aldgate East, which is already east enough, perhaps not further than Liverpool Street.)
As far as the accommodation service from Imperial is concerned, I had a chat with the post-grad admissions person in Physics yesterday and said that I will be receiving info and access to those services as soon as I've accepted my offer and my attendance has been confirmed or something. Given that it is still late March if you plan on hitting private accommodation, don't worry its too early anyway.
NOTE: I asked him if there was any chance to get me in contact with other people in my course that may be looking around for accommodation and said that he would be happy to circulate an email around. If you'd like such an idea also, I'd encourage you to get in contact with the relevant person in your department to.
@Dracion
I bought a bike last June and used it to commute to/from work while I was doing a research internship in the Midlands. Need I say I ended up every single day wet...? Since then and given the whether this year my bike hasn't been out for a ride since September...
It can't be only me that when I wake up and check out of the window and see everything cloudy and gray (which I guess is about 90% of the time) that I don't wanna risk it by taking my bike...