After I picked myself up from the floor and finished a very sweet cup of tea for the shock, I phoned British Gas up. They agreed that was a huge amount for a 4 bed house and we would have to have the heating on full blast with the windows open to justify this. I have been told to monitor the meter for a week and we will discuss it again this time next week. Has anyone else had this sort of bill? We have one of those gas flame effect fires but I only had it re-connected before Christmas and its hardly on. I am staggered!