I did think of that Bill as i sat on the steel based chair and a frayed 230volt wire in the mechanism.
Naturally, i have residual current device on every individual circuit. Effectively i have 14 earth trips for the house and a devise to take out any spikes when someone begins charging an EV vehicle or any other power surge. The very latest consumer unit fitted in 2024 to replace the one i fitted in 2016 which was a split RCD board.
New ones have to be metal cased now and not plastic. No need to keep replacing these boards though and in all my career fitting plastic cased units, i only found 2 that burnt. One did burn the entire house down in Lympstone but very rare