The alarms have a battery backup as well so need need to fit even more! The Kitchen has a heat alarm and the hall has a smoke one.
I can count the number of times we opened that door in the last 2 years on one hand. As I said, it's not safety glass, it lets in a hell of a draft in not to mention water and damp get in round it. As well as that all the post gets put through that letter box which then invloves climbing over hoovers and shoes to get to it. People always knock on the door too, despite there being a much newer upvc door with a doorbell a few steps passed it! I think we might miss the light it provides hence posibly fitting a sunlight tunnel, but that's the only thing we will miss!
I think either just plaster or just boards is the way to go, it's only going to have shelves or coat hooks on it anyway!
Cheers
Dave