hi, i suspect there is something wrong with my boiler as when switched on i can see my gas meter dial moving round. When the boiler is off it hardly moves at all. The meter moves quickly when the boiler fires up -this happens regularly during the time it is on. My gas bill has been over £800 for the year compared with less than half this amount at my previous property where i had the same appliances and the same amount of radiators - can anyone tell me what could be the problem?