(15 Mar 2023, 5:58 pm)morritt89 wrote I vaguely remember from my time at Arriva that there was a switch to reset the 24V sockets. I don't remember GNE examples having this (although there is a interior battery reset button for the internal electrics and I'm now wondering if that resets the sockets).

It's said battery reset button which also resets the sockets. Needs to be done every time the engine is switched off.

I suspect some drivers go for the 'switch every button on' approach to turn on the interior lights in a Streetlite, which will turn the sockets on too.