Hello....I own a property that consists of shop on ground floor and two flats above on one story. Flat at rear with own entrance door. 

Do I need a FRA?

Does Smoke Detector System need to be on separate landlord supply?

Any guide to regulations please would be helpful. 

 

Yes you do need an FRA for the shop which needs to consider the effects of a fire in the shop on other relevant persons i.e. the flat occupants.

If there are no internal common areas to the flats they don't need an FRA but there are fire safety obligations under the Housing Act.

I'd need to see the premises (i.e. doing your FRA) to advise accurately on the fire alarm.