All,

The Rydges link via Imperial College --- better rates than the general web page

http://www.imperial.ac.uk/conferences/form.asp?form_id=4&hotel_id=rydges

Another that in retrospect is closer (by a block) is the Queens Gate Concord

http://www.imperial.ac.uk/conferences/form.asp?form_id=4&hotel_id=concorde

Note the rate is given on the next web page.

Hotels in general around Imperial College

http://www.imperial.ac.uk/conferences/hotel_dir.asp?campus_id=sk