Our house alarm is playing up. The house is circa 20-years-old and I suspect so is the alarm.
The alarm is serviced by a company who took over the original installers and do not support our "legacy" system (other than rocking up annually to test it, replace the battery occasionally and charge three figures +VAT for the 25 minutes it takes them)
I would like to upgrade the system to something reliable/modern. I assume the existing PIR sensors, cabling etc can all be retained.
The servicing company could do the upgrade but is anyone on here in that line of business or could recommend someone local? I am in Chiswick, West London.