Last year I was talked into changing my gas and electricity supplier. The first bill from the new supplier arrived in December and was considerably higher than my previous suppliers but still within what I would call a normal amount. I complained as I had been told I would save money by switching but realised prices had gone up and decided to stick with the new company. The December bill was estimated but the meters where only a couple of digits out so I didn't bother supplying the new readings. The next bill popped through the letter box on Saturday and was for over £500 just for the gas element and was not estimated, but based on a proper reading which I of course double checked myself. The only thing in my house that uses gas is my combi boiler which during the winter I set the timer to heat the house for 2 hours in the morning and 2 hours in the evening, not excessive in my opinion. The supplier is closed until tomorrow morning so I can't speak to anyone but I am besides myself with worry. What the hell could be happening?