mains smoke alarms, link options?

Im wanting to install a few smoke alarms in my house to replace the battery ones I currently have.
Over 3 floors, need 4 alarms, however I would like them to be interlinked.

The only interlinked alarms I have seen/fitted have had a seperate link cable for them, the house isnt going to be rewired or decorated anytime soon, so this is not an option here.

are there any that link over the mains wiring (thinking powerline ethernet here) or if not, any reccomended wireless linked ones? I dont want false alarms all the time, and theres plenty of RF floating round my house with
wi-fi, thermostats, AV senders, and the occasional radiomic already.

hi have seen smoke detectors 240v with rf interlink AICO i think but not cheap.

they are ggod and they comply with BS5839 part 6 as well.
just ensure that the supply is the same to each device IE brown phase or black or grey (or in old colours red yellow blue!)

Agreed to the above.