Charging off Mains - long term

[WannabeOwner]

Or don’t the non-specialised sparks care/know?

My Sparky would know and care, but he would also make a pragmatic decision - within the scope of what he is allowed to do.

does it invoke the earth-rod/Type B RCD regs if they know it is for an EV?

I would expect Sparky to fit all that, if appropriate - i/e/ not to cut corners, and to ensure you were safe. If fitted could that form part of your decision about what to have as a wall charger in future? and thus reduce the cost at that time.