That is only a very recent change though, 1 October 2024[1].
Before that it was very much privatised, 1990–2024[2].
Technically in the background I suspect you will find very little has changed since October 2024 since (a) not enough time has passed (b) things like TUPE means you will end up with most of the same people doing the same things under a different logo, at least for a little while until changes get phased in.
That is only a very recent change though, 1 October 2024[1].
Before that it was very much privatised, 1990–2024[2].
Technically in the background I suspect you will find very little has changed since October 2024 since (a) not enough time has passed (b) things like TUPE means you will end up with most of the same people doing the same things under a different logo, at least for a little while until changes get phased in.
[1] https://en.wikipedia.org/wiki/National_Energy_System_Operato...
[2] https://en.wikipedia.org/wiki/National_Grid_(Great_Britain)