The point I'm making is that the risk for responsible people, who would have a smoke alarm fitted anyway, is much lower than the average, even though there is no way to quantify the fact.
I wouldnt automatically say that by having a smoke alarm fitted that makes the risk "much lower than the average" as you suggest airds, ( average what?)
Would you not agree that by virtue of someone running a B & B, no matter how small, you are increasing the risks by introducing people who are not family members or familiar with your family routines into your home, and you are placing your trust in them to abide and obey to your house rules at all times.
Likewise,when you’re not in your own home, you are at risk from other peoples activities, you’re not in total control of your entire environment,( like you are at home) people are relaxed and unfamiliar with the surroundings, equipment and escape routes, so it is vital that in case of fire, early warning and safe escape is provided.
Its what we would all surely expect.
I have just visited a guest house today where the lady said she only takes regulars, however, she has recently noticed 2 dvd's missing and a book on hill walking has disappeared from her bookshelf, she can only put it down to her guests, which she told me she is surprised about, as they have all been going to her house for years now, and she trusted them all.
We say time and again, its a matter of risk assessment for deciding the level of protection in case of fire that is needed, we are trying very hard to get away from the prescriptive approach where the fire brigades stipulated what you must have in terms of fire precautions, and allowing the persons with responsibilities to make their own decisions on what they need to provide.
But by carrying out a fire risk assessment the need for automatic fire warning should only be one component to be looked at in your approach to fire safety, it would be expected that you take account of other possible fire precaution measures for the reduction of risk.
One of the British Standards provides details on frequencies of fire within rooms in dwellings and concludes that the highest proportion of fires is in kitchens 54%, followed by bedrooms,living rooms and dining rooms at 12%
Would it not be fair to say that in any dwelling ( including a B & B) it is unlikely ever that the risk of fire is so low as to obviate the need for some form of automatic fire warning? and depending on the layout some fire protection for the escape routes to the dwelling? along with some portable means of takling a small outbreak of fire.
Anyway, sorry airds that is still not answering your initial question.