Marlin Apartments are providing a discounted rate of £100/night incl. VAT for 1 bedroom self-catering apartments in the Canary Wharf area and London Bridge area. Commute times to Excel are about 15-20min on the DLR train and Jubilee line.
Please call them directly on the number on the website quoting 'Golden Jubilee 50' to secure the discount rate.
All relevant details on their website.
http://www.marlinapartments.com/index.html