The signs in huts should probably be updated to suit the current rules, and to be 100% clear for the people that are keen to find an excuse to not play by the rules.. I'm always shocked when I walk into an old timber hut and find people have been lighting fires in them, more often than not the fireplaces are in no way safe to contain a fire... Some people seem to think if there's a fireplace they HAVE to light a fire, it's like a compulsion, even if it's the middle of summer, the middle of the day, high temps and high fire danger, they have zero understanding of the risks...
One example is Twilight Tarn hut, the sign on the door covers everything but doesn't specifically say not to tear the ply panel off the fireplace and light the open fire, as people have been doing, people see a fireplace and think the rules don't apply:
Lake Ball hut is fairly clear with a sign in the fireplace:
Raglan Hut has an old sign:
My understanding is there shouldn't be any fires in the WHA, it's all fuel-stove only, but I can understand fires being lit in sub-zero weather in the highland huts that have been renovated and have a decent fireplace, like Ironstone hut with it's stone fireplace containing a nice freestanding woodheater, it's one of the few that "seems" relatively safe to be used in appropriate weather:
Some tinder dry historic wooden huts that are surrounded by leaf litter and dry ferns need very blunt signs in my opinion, "NO FIRES UNDER ANY CIRCUMSTANCES", it's not appropriate to light a fire in them at any time.. Ewe's Inn is a good example of this, I didn't notice any signs there: