Have you asked your DNO? I mean 30amps for the house you wouldn't even be able to have an electric shower or cooker & hob.
Even a kettle at the same time as a fan heater would be risky.
However if that is the case then you won't be able to charge an EV until they upgrade the substation - same as people who couldn't have a mobile phone until they put a cell tower in their area. If you live in the sticks sometimes you can't have nice things, but you get other advantages so it doesn't matter.
Biting the hand that feeds IT
