PC Tizer?

I'd be impressed if it was electrocuted on power rails at King's Cross! They have proper electrification there .

Cats have been living at stations for years - it's nothing new.

Cats have been living on stations for years and not just the quiet ones. I don't know if it still happens but there was a budget for keeping a station cat on LU stations with a proper cost number to book to, to pay for the cat food. Stations I remember having cats were places such as Arnos Grove, where the cat was still fed in the old depot rooms after Ash House opened, Barbican, where the station cat would be found perched atop the UTS gates for the warmth at night in the winter and also a good vantage point for spying out prey, and Farringdon where I recall there were once four cats homed in the signal cabin. In the summer they would sit on the ledge of the open cabin window and at least one did fall to its death.
As for being electrocuted or otherwise injured in my 28 years on the Underground I only ever encountered one dead cat and that was trackside just outside Leyton station. However, there were plenty of dead rats around the job and none worse than at Kennington and of course dead flying rats, i.e. pigeons anywhere and everywhere decaying in places where most would never see them.