Andy Burns wrote:
The zappi route is more expensive, but easier as it disconnects all
connections live/neutral/earth to the car if it senses a fault.

It's not just zappi now, there are others now which use the same method
for PEN fault detection ...

This looks handy - provides the neutral/earth current detection and
disconnect for an existing charger:
https://www.cef.co.uk/catalogue/prod...rotection-unit

Theo