A Smoke Cloak system (also known as a security fog or fog cannon system) is a security measure that releases a dense fog or smoke to obscure visibility during a break-in or unauthorised entry. It is used in both commercial and residential settings to deter theft and protect assets.

Emergency lighting is a legally required safety system in the UK that ensures safe evacuation, visibility of escape routes, and identification of fire safety equipment during a mains power failure.

In the United Kingdom, the latest update to fire alarm signalling and system compliance has now come into force via the revised standard BS 5839 1:2025. The revision replaced the 2017 edition. This update includes significant changes around alarm transmission times, system design, documentation, maintenance, and overall signalling performance, meaning organisations responsible for fire safety need to act swiftly.