Re: No second hand market - pre-heating a vehicle
"It is *certainly* illegal to retrofit an ICE engine or ICE hybrid with remote start"
Careful there, straw men can be inflammable.
Many diesel vehicles (especially those designed for colder winters than you usually get in the UK) are fitted with auxiliary heaters.
Usually under one wheel arch, these can be turned on via remote control to burn diesel and heat up the engine by circulating the coolant using an auxiliary pump.
VW Sharan and Ford Galaxy are two prime examples.
So you don't need an electric or hybrid car to pre-heat the engine and cabin. You don't need to start the engine either, and leave it running unattended. All available for ICE vehicles as standard.