Changes to Smoke Alarm Laws: Residential properties that are subject to sale, or for rent are now required under the Building Regulations 2012 to have compliant mains powered smoke alarms installed. Battery powered smoke alarms may be installed where consumer mains power is not connected to the dwelling or where there is no hidden space in the existing dwelling in which to run the necessary wiring for hard wired smoke alarms, for example where there is a concrete ceiling. The use of battery powered smoke…