[caiusdurling]

I think the MG4 has a brake by wire system, although those are supposed to have a failsafe built in but if it's not electro-hydraulic there might not be a mechanical link between the pedal and the callipers. Handbrake will be electric too, so activation depends on enough of the car brain functioning.

Keyless ignition usually has an override for a running car too, in a ford pushing the button three times within a few seconds turns the combustion engine off. Wonder if that's the same in electric cars, otherwise the only way I can think to kill it is isolate the batteries, same as emergency services would do in an accident.

[EricE]

Another, more detailed account link to elsewhere in the comments pointed out that the police were even on the phone with engineers from the car manufacturer - if there was such a magic sequence apparently it didn't work. Yeah! Software Everywhere!