The Napit EIC should cover the charger installation (a) new circuit (b) consmer unit.
Part P certificate can take up to 30days to arrive, from when the installer notified your LA’s building control dept. (You can check on the LA’s online planning portal to se if it has been registered yet)
Send DNO ref: ENQ23160563, if by email forward to the HA or just a note with ref number on
Was there anything in the box that stated charger warranty? I will see if I can find a warranty cert if not.
Was Jeffrey Davison the installer?