Check-in January 14 for 1 night

Looking for any great deal in London but seems the following offer the best starting points:

London Marriott Hotel Maida Vale 119 GBP ex VAT
Renaissance London Heathrow Hotel 76 GBP ex VAT
London Heathrow Marriott Hotel 99 GBP ex VAT

I need 1 more night to get mega-bonus points. Special thanks to those folks that provided info on the free buses that run from LHR to nearby Marriotts.

Thanks in advance.