http://www.ukhotel.com - which is an established and respected site that has been around since the 90s - is now offering a price comparison facility.
Go to any city, town or village on the site and you'll be able to look up availability and compare prices. Save £100s on Valentines weekend, or any other trips that you have planned.
The site currently searches Laterooms, Active Hotels and Superbreak, with more being added in the coming weeks.
Hope you find it useful.