Where do you draw the conclusion if a property needs separate FRA’s? For example residential blocks not connected by MOE, own ingress and egress but managed and connected by the same AFD. Some clients insist on separate FRA’s whilst some want one to cover all for overall reference and autonomy. 
Thoughts greatly received. 

There is no hard and fast answer, it's a case by case thing. All being on one alarm system leans towards one report, but it could equally be done as three.

Really massive multiple building sites need splitting but in smaller cases it's on the merits of each case.

Appreciate the reply. You’ve confirmed my thoughts. Thanks.