At our recommendation, our friends booked their London hotel through Hotels of London http://www.hotelsoflondon.co.uk/ and were completely satisfied with the great rates and service this company offered. We exchanged web site links with Hotels of London many years ago.

Last time we were in London, we stayed at The Washington Mayfair Hotel. We loved the Mayfair location, convenient for walking to just about everywhere in central London.

Hope that helps, Linda