You may find Travelodge a better bet, they have some £26/£46 deals on rooms in London. Unless of course you are desperate to stay in an orange and possibly windowless room..!

Quote from a mail received this morning from Travelodge "This offer includes £26 rooms at Travelodge London Islington, Farringdon, Kew Bridge and Docklands plus £46 rooms at Travelodge Kings Cross, Liverpool Street and Covent Garden."

You can check availability here.

Travelodge is a good value brand in the UK, rooms are clean, full facilities, TV, etc. Get in quick though, these deals have just released and will go quickly. Of the above properties, Kew Bridge is a way out of the central area, maybe 30 mins by tube, Docklands, about the same by light rail and tube, the rest are in or around the centre of town. There is a location checker with maps on the site.

g'luck.. ^