Shame the staircase comes down into the lounge. I wouldnt go with HTM 88 personally. You can liken this to a domestic scenario. LD1 is totally overkill, LD3 is more like it. If you have room you may consider trying to protect the staircase somehow, but dont do that at the expense of living space for the children.
Ill try and find copies of the guides i mentioned. They were produced by CFOA now i come to think of it and are a better fit than HTM 88 in my opinion.
Disagree Cleveland. HTM 88 is probably the only guide that fits this scenario properly. The guides I think you are refering to were CACFOA circulars, and didn't cover adult placement.
Jaspar I would look at a few things. I do agree with CF3 that this should be treated very much like a normal domestic scenario. The whole point of schemes like this is to de-institutionalise adult care, so making clinical alterations to the staircase would not fit in with the spirit of what they are trying to achieve.
Would it be beyond the realms of possibility to have a member of staff awake at night? (Wage bill for a night worker may be higher than a waking staff member - but don't its worth asking if the organisation will do this)
Its important to have a balanced approach. I feel LD1 Grade C alarm system would be unecessary, but considering the staircase issue then perhaps an LD2 would be advisable.
That coupled with good management (these places generally are well managed), PAT testing carried out, electrics up to standard, limited combustibles in the lounge then I would say that the staircase can be left as it is.