In this actual case, none of the doors are fire doors, just el cheapo B&Q
jobbies.

Several times when I've talked through with friends (that are about to
move) about the house (or particularly flat) they're thinking of
buying, they seem to have a complete disregard for physical fire
protection - even when it's pointed out to them.

Even the ones that are over-protective of their children and very risk-
averse, don't seem to think fire doors and compartments as an
essential if they're living in close proximity to other flats.

Maybe the message about smoke alarms has been too loud - to the point
of many people trusting one bit of technology to the exclusion of
being concerned about any need for fire-resisting and fire-limiting
buildings (and the need to not over-stuff their own house or flat with
junk to the point of it being a ready-made bonfire).