The definition of remises in the RR(FS)O is "Any Place" and therefore a FRA would be applicable to all places that are not exempted or excepted. Article 31 refers to an enforcing authority issuing a prohibition notice and gives an explanation in para 10 as to what can be prohibited, common parts ot shared accommodation but not the single private dwelling bits. As regards Q1, the private dwelling, surely detection is required to alert the remainder of the people in the premises to a possible fire situation. Q2, these are not in the definition of a single private dwelling and are subject to an FRA but not recorde unless the property is licensed by the local authority, in which case it will be recorded. ( For licence in the RR(FS)O anything that is registered certificated or licensed is included in Article 42 and 43)
Q3 Undertake the FRA and see what is required as preventative and protective measures and then justify the resulst.