Arguably the bar is lower for something you put in yourself on your own property, as it is you that will suffer the consequences, and you that will (presumably not bother to) dob yourself in to the relevant authorities if a bad job is done...

For part P a new circuit is notifiable, and in Wales rather more, including any outdoor wiring I think (and I wonder how often that notification never occurs and wiring appears by magic).

For the DNO, all new fixed loads over 3kW are notifiable, but we know that electric showers and cookers have been added for many years without anyone actually bothering with this.

(find your DNO here https://www.energynetworks.org/customers/find-my-network-operator )

But a car charger is likely to be on for many hours, so either a load limit circuit with current sensor on the meter tails or a supply uprate may be in order - especially if your house has a shared feed. Without knowing your DNO I do not know their policy, but round here (SSE) they seem to take a similar line to solar power, where usually they need to be told within so many days after the fact and it feeds into their worry plan about the rating of the transformers at the end of the street. Some local substation transformers to me seem to have sprouted a fan kit in the last year, which I assume is a cheaper  halfway house compared to a full transformer upgrade, though if this is EV driven or solar power, or just heating and load creep generally,  I cannot tell.
Note that there are several conditions (higher power, fully loaded supply ) that pre-notification is needed. Your DNO will know.

The paper trail consideration may come when trying to sell the house at some future point, but at the very worst it gets sold with the charger temporarily disabled. Note that as others have said, many chargers expect a data connection back to the mothership, though why, and what happens without it is not always made clear.

Mike.

Arguably the bar is lower for something you put in yourself on your own property, as it is you that will suffer the consequences, and you that will (presumably not bother to) dob yourself in to the relevant authorities if a bad job is done...

For part P a new circuit is notifiable, and in Wales rather more, including any outdoor wiring I think (and I wonder how often that notification never occurs and wiring appears by magic).

For the DNO, all new fixed loads over 3kW are notifiable, but we know that electric showers and cookers have been added for many years without anyone actually bothering with this.

(find your DNO here https://www.energynetworks.org/customers/find-my-network-operator )

But a car charger is likely to be on for many hours, so either a load limit circuit with current sensor on the meter tails or a supply uprate may be in order - especially if your house has a shared feed. Without knowing your DNO I do not know their policy, but round here (SSE) they seem to take a similar line to solar power, where usually they need to be told within so many days after the fact and it feeds into their worry plan about the rating of the transformers at the end of the street. Some local substation transformers to me seem to have sprouted a fan kit in the last year, which I assume is a cheaper  halfway house compared to a full transformer upgrade, though if this is EV driven or solar power, or just heating and load creep generally,  I cannot tell.
Note that there are several conditions (higher power, fully loaded supply ) that pre-notification is needed. Your DNO will know.

The paper trail consideration may come when trying to sell the house at some future point, but at the very worst it gets sold with the charger temporarily disabled. Note that as others have said, many chargers expect a data connection back to the mothership, though why, and what happens without it is not always made clear.

Mike.