I wouldn’t assume anything in these matters some DNOs are better than others. As long as the charger was rated appropriately everyone was happy to install on a 60A cutout here and in fact with a looped supply too, that could well be why it’s been setup this way here.
The difference being, where a properties maximum demand with a new connected load does not exceed 60A the installer can connect and notify the DNO of the installation of a charger or where it is deemed satifactory by the DNO to connect a charger untill such time any remedial minor works are carried out such as upgrading the incoming supply.
A 60A BS1361 cut-out fuse has a fusing factor of 1.5 times its rated current and will withstand 1.45 times for a short duration of around an hour. Basically the same for plug top fuses.
However, having an existing electric shower or induction hob etc, will trigger the DNO to investigate and any minor works carried out where required.
There are simple rules chargepoint/MCS installers are aware of regarding the DNO.