The UK government is set to broadcast a startling test message to tens of millions of mobile phones across the nation this Sunday, trialling a new emergency alert system designed to warn the public of imminent threats to life.
At precisely 3pm, a loud, siren-like sound will blare from compatible devices, accompanied by a vibration and an on-screen message. This marks the largest-ever test of the new life-saving public warning system, intended for use during severe flooding, wildfires, or other major emergencies.
How the System Works
The technology functions by sending a broadcast message to every compatible phone and tablet within range of a mobile mast. Crucially, it does not require any phone numbers or personal data, operating instead like a radio broadcast that targets devices in a specific geographical area.
Authorities stress that the system will only be used in rare, genuine emergencies where there is a significant risk to life and property. The alerts are free to receive and will never require you to reply or click any links.
Opting Out of the Test
For those who wish to avoid Sunday's test, it is possible to opt out. Users can search their device settings for 'emergency alerts' and turn off 'severe' and 'extreme' alerts. However, the government strongly advises against this, warning that in a real crisis, these alerts could provide vital, life-saving information.
The system has already been used successfully to issue a localised alert during a severe flooding event in Reading, demonstrating its potential utility.
A Coordinated National Effort
The test is a joint initiative between the UK government and the nation's major mobile network operators. Chancellor of the Duchy of Lancaster, Oliver Dowden, labelled the system a "vital tool to keep the public safe in life-threatening emergencies."
This move brings the UK in line with other countries like the United States, Canada, and the Netherlands, which already have similar public warning systems in place.
