There are now 51,000 public charging points in the UK, and the number is growing daily. 45% of the chargers are in the London and the South East, so take the time to understand the charging infrastructure where you live - Zap Map is a great tool for this.
The cost of public chargers varies from 38p / KWH for slower chargers that will take 4 - 8 hours to charge your car, to 70p kW/H for ultra fast chargers, that can charge in less than 30 minutes.
So how much does it cost? You can work this out easily by first finding out your battery capacity.
If you have a 77 KWH battery (the battery in a VW ID4), then using a 38p/KWH charge point would cost you £29.26 (0.38 x 77) for a completely full charge.
Sounds quite cheap, but when you consider a VW ID4 will only do 250 miles with ‘normal’ driving, which is around half that of a modern petrol car, suddenly you realise the running cost is only around 15% cheaper than petrol!