That's cool but who is going to pay the upfront cost for the heat pumps? The sources I could find say we currently have 412 heat pumps per 100k people in the UK

That's cool but who is going to pay the upfront cost for the heat pumps? The sources I could find say we currently have 412 heat pumps per 100k people in the UK. Ordinary people can't just afford to drop 10k for a heat pump + installation for it to pay for itself 20 years down the line.