we expect the reverse i.e. some kitchens and bathrooms are removed.
Who is 'we', again you are not referring to any regulation.
This is just 'your opinion', because I am aware of no regulation that says you have to rip out fittings.
Building regulation B about fire safety because the lack of door in case a fire spreads and Building Regulation F about ventilation because the pollutant from the car which goes everywhere in the house.
Approved documents are not the regulations.
Can you quote the regulation, and demonstrate they are not meeting it. And can you secondly demonstrate how this will affect planning departments decision, doubtful, as has been explained to you this is mostly irrelevant to them. They could put in a fire door, can't see how this actually helps your case in any way?
Also domestic properties usually require no fire doors in this situation.
Seems again that you are clutching at straws and throwing about lot's of guesswork and personal opinions, this means squat to PD.
Think it is about time you start accepting answers given, rather than trying to waste everyone's time with your busybody attitude.