Here is a list of useful links for hotels:

The AA
From farmhouse charm to five-star luxury, we have just the place for you.
Find it with our essential guide to around 8,000 AA-approved hotels and B&Bs
www.theaa.com/getaway/hotels

London Hotels Guide
With over 400 London establishments to choose from, we can offer you the best accommodation in London to suit your budget and location with rooms from the lowest rates to sheer luxury. Use one of the searching methods below, click on the logo of your favourite London hotel brand or choose from the cheap, midrange, quality or luxury budget ranges. Full details of each London establishment are available online, while price and availability can be checked prior to making a secure online reservation, which is followed up with a confirmation email. Please note that your credit card will not be charged until you finish your stay at the hotel.
http://www.london-hotels-guide.co.uk/

Visit Us B & B UK
Visitus is a comprehensive guide to thousands of Bed and Breakfast accommodation providers in the UK. Detailed information on price, facilities, ratings and locations on each hotel or bed and breakfast guest house is included.
www.visitus.co.uk

Cottage Guide
Holiday cottages in England, Scotland, Wales and Ireland - and a selection of over 3000 self catering holiday homes including farm houses, country houses, town houses, apartments, log cabins ...and even a few railway carriages!
www.cottageguide.co.uk