British Gas, OVO, EDF, EON, Octopus customers who agree to spend £4 handed £344 back

British Gas, OVO, EDF, EON and Octopus customers who are worried about the energy price cap can spend £4 for £344 back, it has emerged. Customers concerned about the new £1771 price cap from Ofgem, starting October 1, can get 20 per cent off their bill.

That's if they agree to part with £4 for a radiator bleed kit. Mitchell Wray, home heating expert at National Insulation Supplies, explained: “There are often household maintenance tasks that can be neglected or forgotten, and for lots of Brits bleeding your radiators might be one of them.

“Lots of advice often is focused on the central heating and boiler itself, but often money is wasted by not checking your actual radiators, and in some cases, can impact your overall central heating.

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"Bleeding your radiator means freeing air that has become trapped in your radiator. This is a problem because the radiator won’t heat up as effectively. Your boiler needs to use more energy to fight the air, costing you more money”

Make sure to turn the heating off first. It’s a good idea to set up your cloth or container ready to catch any water. Find where the radiator bleed plug is located. Open the valve using your radiator key. Turn the valve in an anti-clockwise direction until you hear a hissing sound.

Wait until the hissing sound stops, and then close the valve. Do this for all radiators in your home. When complete, turn your heating system back on and check the pressure using the gauge on your boiler. If, after doing this, you have any problems relating to your pressure, boiler, radiators or hot water, you can find boiler servicing and professional assistance.

Amazon has a range of radiator bleed kits suitable for all conventional radiators online, with prices as low as £4.