fire system

hi all, 

just wondering as it's quite confusing as to what fore system (grade) are required for each property. 

now .... we know that in domestic properties they require grade D in the hall ways and landing, all interlinked with battery back up.

now what about in a house turned in to two flats does this require a automatic alarm with a panel and detectors in the communalpart and in the flat hall way.

hmo requires a full grade a system..... does anyone have a document that shows what to put and where??? 

I know it's dirrernt and many require risk assessments but there must be a general guide line. 

Cheers

Leave it to the fire risk assessor to determine what is needed, then if you have the required insurances, documents etc. install to the FRA.

I would not recommend getting into defining what system is required unless you are competent/covered to do the FRA.