They are trying to push people to heat pumps (basically air conditioners tech wise)
They are also moving towards building/efficiency regs that require completely sealed houses and forced air systems in new builds.
So new houses will effectively be required/encouraged to have an air con capable houses.
The old housing stock though? Oof. I'm on a private estate that even bans that kind of stuff!
I guess that's to stop people from using it to get air-con when it's mean to help people move away from gas. A bit silly though.
.....I suspect there are a few models that only need 1 part switched for it to be possible....