Mrs Smith, 1920s detached house

“We had long wanted to do ‘the right thing’, but not knowing quite where to start, put it off. We are now gas-free and our bills are down by over £100 a month.”

Jamie, Victorian mid-terrace

“Getting a heat pump enabled me to switch to a Time of Use tariff, which means I can get cheaper electricity to power everything, not just my heat pump. I pay £50 a month for all my heating, hot water, and electricity.”