2. Time-of-use pricing for heat pumps is very effective at shifting demand, halving consumption during the evening peak and reducing annual consumer bills by 18% compared to standard tariff.

3. The current UK heat pump subsidy, the Boiler Upgrade Scheme, provides positive welfare benefits relative to costs, with £1.24 of societal benefits for every £1 spent. The societal benefits would substantially increase with learning-by-doing benefits.

I find the Cosy tariff odd for ASHPs, encouraging just 6 hrs use when longer running hrs will deliver higher scop We use the Agile tariff for ASHP, just avoiding running during the 3 hr peak rate period, and paying 4p/kWh heat as a result