The future of Britain's green home revolution could hinge on one thing - the price of electricity. A new report from Mitsubishi Electric warns that unless power costs are reduced, millions of homeowners will be unable or unwilling to make the switch from gas boilers to low-carbon air source heat pumps. Despite growing public concern about climate change and strong interest in greener heating, electricity remains far more expensive than gas, creating a financial barrier that could derail the country's net-zero ambitions.