My kitchen is off the living room in the new place, there is a doorway but no door to the kitchen, while there is a door (fire door) to lounge from the hall. I want to have the kitchen door as I don't like open plan, Can I move existing door (to the lounge) to the kitchen doorway, really to save the money on buying a whole new door, the size seems fine? I'm concerned that it's now illegal not to have doors to all rooms (but it doesn't make much sense as kitchen is more fire-risky than lounge yet there are so many open planned ones (or semi open with no doors). No idea where to get info on this, so at least that would help, if no one knows for sure. Thank you!