A picture of the test alert on a smart phone

A UK-wide emergency alert system announced by the government is due to be tested on Sunday, 23 April.

A message will appear on the home screens of mobile phones and tablets from 15:00 BST, accompanied by a loud siren-like sound or vibration lasting for about 10 seconds.

The minister in charge of the system, Oliver Dowden, said the new system was a "vital tool to keep the public safe in life-threatening emergencies".

What will the message say?

The test alert will say: "This is a test of Emergency Alerts, a new UK government service that will warn you if there's a life-threatening emergency nearby.

"In a real emergency, follow the instructions in the alert to keep yourself and others safe.

"Visit gov.uk/alerts for more information.

"This is a test. You do not need to take any action."

The test had originally been planned for the early evening but was moved to avoid clashing with an FA Cup semi-final, which kicks off at Wembley Stadium at 16:30.

Phone users can swipe away the alert message or click "OK" on their home screen to continue using their phone as normal.

Which devices will receive the alerts?

The alerts will work on all 4G and 5G phone networks in the UK and on devices with the following software:

  • iPhones running iOS 14.5 or later
  • phones and tablets running Android 11 or later

There is no need to register or download an application.

But older "non-smart" phones will be unable to receive the alerts, and nor will devices that are turned off or on aeroplane mode. The alert will sound on phones on silent mode.

The government has said the emergency services will have other ways to notify those without a compatible device.

The alerts will not replace local news, radio or social media.

Can users turn off emergency alerts?

Despite the government strongly recommending enabling devices to receive alerts, users can opt out by searching their settings for "emergency alerts" and turning off "severe alerts" and "extreme alerts".

Is personal data protected?

Personal data about a user's device or specific location will not be collected or shared, according to the Cabinet Office.

The alerts will be broadcast from mobile-phone masts to every compatible phone and tablet within range - the government or emergency services do not need to know the mobile-phone number or any other personal data.

A picture of a mobile phone tower in the US

Why have some organisations criticised the test?

Domestic-abuse campaigners, including the charity Refuge, warn the test could endanger some vulnerable people by potentially alerting an abuser to the location of a hidden phone.

The government said it had been engaging with the organisations to ensure vulnerable people were not adversely affected. Refuge has produced a video showing how to turn off the alerts.

Drivers are also advised not to look at or touch their phone until it is safe to do so, just as when receiving calls or messages.

When might emergency alerts be used in the future?

Emergency alerts, with advice about how to stay safe, will be sent - locally or nationally, by the government or emergency services - on rare occasions where there is a threat to life.

They will initially focus on the most serious weather-related events, such as:

  • severe flooding
  • fires
  • extreme weather

But many people will not receive an alert for months, perhaps even years.

A picture of a group a group of people, including a small child, in rescue boat after flooding in Wales, with rescue workers

Do other countries use emergency alerts?

Many countries around the world use emergency-alert systems, including the United States, the Netherlands and Japan.

Japan credits its system with saving countless lives in natural disasters.

The US system allows the president to send a message to citizens directly.

But it does not always go to plan.

In 2018, in the US state of Hawaii, an alert warning of an incoming missile was sent in error, causing widespread panic.




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