I normally stay in Central London when on business in town but for the week in question, pretty much everywhere was full or stupidly expensive. Almost in desparation, I took the recommendation of Expedia and I am so glad I did. The staff are unbelievably helpful and courteous and as for the building itself, wow!! If you are into art deco you really cant stay anywhere else. My only criticism is that in order to get into the City, there's no choice but to take the overcrowded Central Line. If you have any luggage, don't even try - take a cab.
But do stay at this hotel. I can't fault it in any way.