Where I find trip advisor quite useful for hotel reviews, I didn't realise it had this little addition for the dirtiest hotels!
http://www.tripadvisor.com/DirtyHotels1.Cromwell Crown, London, England
2.Corbigoe Hotel, London, England
3.Nanford Guest House, Oxford, England
4.Cosmopolitan Hotel, Brighton, England
5.Eden Plaza Hotel, London, England
6.Hanover Hotel, London, England
7.Rose Court Hotel, London, England
8.Imperial Hotel, Manchester, England
9.Gresham Hotel Bloomsbury, London, England
10.Park Hotel, London, England
Some of the comments are really awful!
