I did, H. The London hotels are all vying with each other, now, to provide the best experiences for the uber-wealthy. We stay at the St Pancras Renaissance hotel a lot, and their top suite - the Royal - is £14,000 a night. But it's always worth asking these places if they can upgrade you when you go. Last time we went they upgraded us to a three storey suite in the hotel.
Do like the Langham, though...