In contrast to heat pumps, continuing record sales of electric cars indicate they are all but set to replace their petrol and diesel counterparts in the coming years on UK roads.

Emma Pinchbeck, CEO of the Climate Change Committee, praised the improvement in greener transport.

"We've made big progress on things like electric vehicles, where one in four cars being bought in the UK today is now an EV."

She said the growth had been accelerated by the Iran fuel crisis, which has seen significant increases in petrol and diesel prices at the pump pushing people to seek out other options.

"We can see in the numbers what people want - cheap cars and cars that will save them money, particularly as fossil fuels are volatile," she said.

But the industry body, Society of Motor Manufacturers (SMMT), said most of this demand had been brought about by huge discounts offered by car manufacturers.

"This has cost the industry more than £10 billion since 2024 – an unsustainable amount when that money should be going into R&D, manufacturing and the workforce," said Mike Hawes, CEO of SMMT.

It supported the government's plan to weaken its Zero Emission Vehicles (ZEV) mandate - which sets a target for number of EVs manufacturers produce and a penalty for failing to meet that target.

The UKCCC disagreed and urged the government to keep the policy.