The ballpark number for EVs is that they are 4x more efficient than ICE cars AIUI. Harder to ball park heat pumps because it depends on the climate, but 4x is

The ballpark number for EVs is that they are 4x more efficient than ICE cars AIUI. Harder to ball park heat pumps because it depends on the climate, but 4x is probably a reasonable guesstimate. At worse it's equal to burning things for heating (when it's too cold outside to use heat pumps, not sure that really happens in Britain), at best it's... some ridiculous factor better (when it's practically the same temperature outside and inside).