Trawling through the recent Horizon programme which seemed to be inordinately long, i did see one that that interested us. There was one safety chap who took his own smoke/breathing mask with him to hotels and such like.
Is it worth getting one of them, depending on whether i can find out where they actually sell the things as i can't find anything that looks remotely like it, nor are they forthcoming about prices.
I thought it might be useful if I ever want to take up any DIY that might just cause a bit of smoke sometime :)