Stayed here last week, and confirm the M Club is on the ground floor to the right of Carlucccios. I didn't have time to experience the evening service in the lounge, but breakfast had quite a variety of items.

No room upgrade, but I did get a very nice cupcake gift in the room. They seem to renovating floor by floor. My room was on 5 and quite dated, but acceptable. Floor 2 was under renovation and looked very impressive (at least from the lift).