While in London, I have visited Mistress Annabel and Mistress Alexia. Mistress Annabel offers multiple rooms that are extremely well equiped. She is also very busy. This place is well worth a visit. http://www.lebanna.com/mistressannabel/welcome.htm
Mistress Alexia has a smaller facility near Baker Street, but it is also well equiped. Oh, and by the way, she is sooooo attractive! I was her slave at one of the London Fetish clubs once. That was some night, but wearing the collar on the tube was a little much. http://www.mistressalexia.com/s8.php?gid=ab
enjoy
