As Motability pay for the EV charger, the extra cost from Ohme may still be much less than paying for my own EV Charger and installation.
The second CU arrangement is Tails > Type A RCD (100/30-A 100 Amp Double Pole 30mA 10kA) > SPD followed by the individual circuit breakers. It also has 4 slots available. So may have been ideal if the 25mm tails had been fitted š However, as you note, what Ohme say and what the electrician say’s when they’re on site are two different things !
I wont say anymore about the electrician and the 16mm tails except to say ‘they’ no longer benefit from any form of accreditation.
Re the HB, the block /insulation was found to be at fault between the two poles according to the report from the fire investigators. We were watching TV when we heard the cracking and the power dipped in the street. Within 10 minutes their house was ablaze.