Does anybody out there recognise which brand/model uses the fitting for this mains powered smoke alarm? No manufactures marks on the plastic fitting.
BRK Used on 600 & 700 series. Here we go: https://www.safelincs.co.uk/replacing-brk-600-and-700-series-smoke-alarms/ If your replacing it, then look at AICO,nothing better.
Recently the fire brigade were doing door to door in my area. They were checking to see if you had smoke detectors fitted. They were offering smoke detectors&fitting them for free.