 I had booked and paid for a large double bed rather than a single as I don t sleep well in a single bed I also asked for a quiet room On arrival I was allocated a twin room where two single beds were made up individually and pushed together This defeated the object I went back to reception and the room was changed for another room less quiet but it had to single beds pushed together and made up as a king When you ask for a double bed I think you should get a double bed 
 For London it was a large room and it was conveniently located near the tube station