Thread: Safe room specifications/designs

I've potentially got a big move coming all going well with house sales etc.
I'll have room for a proper built in gun room.
I seem to recall there was guidance on the old police firearms site but haven't found it in a cursory look on the FSA site.
Anyway, does anyone have any plans or ideas for gun rooms? I'll only need A-Cat spec as I'll just put the current Endorsement approved safes inside that. Potentially make it big enough for a reloading room as well but not committed to that idea.
Most useful would be the wall and door types you've had approved by Police/FSA.
Have you got windows? Can you have windows with bars etc?

I will talk to my Arms Officer before I start of course but as with any project, planning is half the fun.