Originally Posted by Aviatrix
When I was a student I used to stay at youth hostels - and there are plenty of those in London, see
www.yha.org.uk for further details. You need to join the Youth Hostels Association in your country in order to stay at YHA hostels in other countries.
The YHA's in London now are about the most expensive in the world for a dorm bed...about $US45 a night now.
I might suggest a B&B in Windsor. You can get up there by local bus out of T1, and the tourist office could book you something if you arrive early enough in the day. They should have a web site that you might be able to follow up on.