Hi. Can anyone advise me on the following? Does a ground floor open plan restaurant need an alarm system if it has separate apartments above? It currently has sufficient exits, emergency lights, staff training, and extinguishers, etc in place. However, if there is a fire what about the apartments above? I understand that the whole building is owned by the same person. There appears to be a minimum 60 minutes fire separation from the restaurant to the flats and they have their own entrances to the rear.