British Gas Fixed Tariff?

I'm not disagreeing with you, Mark, I've always had gas heating & hot water for that reason. To change the system would cost more than paying the bills.
However, with gas, its not just the "therms you use, but you have to factor in the cost of the Annual service. Since I'm clueless I also pay for Breakdown cover, which includes servicing and all parts and labour. It gives me peace of mind when something goes wrong.
The boiler is 17 years old now so nothing would surprise me! I believe there's going to be a ban on the installation of new Gas boilers soon so whether I'd be able to replace it when it fails - I don't know,
My hotwater tank has an immersion heater so I could do without gas for hot water; I could get an electric hot plate, instead of the gas rings but the missing thing is heating the house. A few electric heaters in the most used rooms would help but, whatever I do to avoid using gas, I'd still have to pay the daily standing charge.

If I had an old boiler and was thinking of changing it, I'd get a quote for an air source heat pump, particularly as I have radiators already installed and somewhere outside convenient to install one. A radiator in main living room might need upgrading. The government is currently giving £5000 towards one (for the first 90,000, so the final cost would likely be £2000 to £5000 depending on size recommended for the house - with inflation now, these figure could change quickly. Heat pumps work similar to a freezer but taking heat out of the outside air and using it to warm the water inside.

We used  to use coal/wood till 2012 when we had a heat pump fitted. It was cheaper to run than coal and a lot cleaner. It is not quite as efficient as it could be as we didn't change any of the radiators. Last winter, which was mild, it used, on average just over 11 units a day during dec. to Feb., mainly heating the living room and kitchen plus hot water. I don't miss emptying all the ashes and having to light it regularly. The only drawback is, being all electric, when there is a power cut, we lose everything - heating, cooking, lighting even phone now. A wood burner for emergency use is needed in the living room really. We have a calor gas stove and propane bottles for emergency use (used once so far just for cups of tea).

I wouldn't really recommend stand alone electric fires now with the price of electricity going up and up. Our electric is working out at the moment at 40p a unit, so for a fiver,one bar could be on for 12½ hours, 2 bars for 6¼ hours and it's going up significantly in October, and then again in January.

If you stopped using gas, you would need to query the gas standing charge continuing to the end of your contract.