On Monday, July 15, 2019 at 7:42:00 AM UTC+1, wrote:

My alarm, smoke dets, CO dets and CCTV system is also on its own RCBO. And ditto all outside sockets and outside lights so the internal sockets and internal lights are not affected by outside events.

That's the direction I am heading in as whilst I've never had any issues, nuisance trips etc, I may as well design in robustness whilst I am undertaking other changes to the system.