Hi everyone
Thanks for all your responses, it is not possible to put in an external means of escape. The management of the building is considering enclosing the staircase and creating protected lobbys but this cost is currently being reviewed against the costs of a sprinkler system to the bedrooms and on the staircase and the lobby.
Whilst a number of people have made reference to guidance documents, I would like to point out that when I met the fire safety inspector he asked what documents I have consulted, I told him Approved document B, NASHiCS guide, BS9999 etc however he told me not to look at any other documents apart from the relevant CLG guide and stick to it.
To be honest I am comfortable with the fire risk assessment but confused with the guidance from the fire safety inspector, I have spoken to two retired fire safety inspectors who both agree that the risk should be classed as High, travel distance should be 9m due to dead end situation and the fact that the staircase is open. Whilst I could justify an extended travel distance due to L2 alarm, fire doors etc I could not justify a 23m distance without additional measures.
So back to the original question, risk category, Low, Normal or High. The house is basically normal risk but due to disabled occupants does the risk move to High? - the fire safety inspector told me to always go off 18m even if it is a dead end situation?
??
Jason