It's quite possible that British vehicle owners don't have as many garages (probably synonymous with the ability to easily charge at home) as owners in the US: https://worldofsynonym.com/qa/what-percentage-of-uk-homes-ha...

Even home electric prices are very high now: 34p per kWh:

https://www.nimblefins.co.uk/average-cost-electricity-kwh-uk

Most electric in the UK is green now, and with the continued forced elimination in fossil fuels' for home heating, it's going to keep going up. Of course, being green is literally cold comfort to old age pensioners who can't afford to heat their homes anymore.