UK Emergency Alert System

UK Government’s emergency alerts system now operational

UK Emergency Alert System now fully operable in the event of a real emergency

The UK Government’s emergency alerts system is now operational despite problems on the Three network during its first test.

Deputy Prime Minister Oliver Dowden announced in Parliament that the system – which sends alerts to all mobile phones in an area that could be subject to a civil emergency – is now fully operable in the event of a real emergency.

This comes after its first nationwide test on Sunday 23 April when a significant minority of mobile phones, notably on the Three UK network, did not receive the alerts.

Dowden said it did work with the vast majority of 4G and 5G enabled devices, with an estimated 80% of the mobile phones in the UK responding, and that no security or public safety issues have been reported as a result of the test.

He said the Cabinet Office is now working with Three UK to fix the problem encountered on its network, and with mobile network operators and other stakeholders to identify operational issues. It will also conduct further operational testing, although any more public tests are likely to be in the coming years rather than short term.

A further issue has been identified with the Welsh language version of the test message. Dowden said this has been attributed to an online system making a small autocorrect that rendered one word in Welsh incorrect.

In addition, “a very small number” of devices received more than one alert due to a few cellular masts continuing to broadcast after the end of the test, and people travelling between England and Wales as it took place would have experienced two alerts.

“Sunday’s test serves as an important development in the roll out of an emergency alerting system,” Dowden said.

“It has allowed us to further validate the effectiveness of the system and build public awareness, familiarity and trust.”

Emergency Alerts System

Two years ago, the UK Government launched its Emergency Alerts warning service, with public trials in East Suffolk and Reading. Today, the system went fully operational.

Emergency Alerts are a public information service that the Government has developed to alert citizens to emergencies, both nation-wide and in their local area, that represent a severe threat to life and/or property.

They are text-based messages that will be broadcast from cell towers to people’s mobile devices, detailing the emergency and actions people need to take to ensure their safety. Emergency Alerts will be sent across all networks.

Emergency Alerts appear on your device’s home screen. You have to acknowledge them before you can use your device’s other features. They appear as a notification and may include telephone numbers or website links to further information.

A loud, distinct tone and vibration is usually associated with the message to raise awareness of the hazard or threat.

Stop what you’re doing and follow the instructions in the alert. Read the content carefully. An Emergency Alert is likely to include a link to where further information is contained, and/or a helpline.

If you’re driving when you get an alert, find somewhere safe to stop before using your phone or tablet. It is illegal to use a hand-held device while driving, even when receiving an emergency alert.

You may get alerts about severe flooding, fires, explosions, terrorist incidents or public health emergencies. Emergency alerts will only be sent by the emergency services and/or government departments, agencies and public bodies that deal with emergencies.

For most people, the chance of receiving an alert will be low.

What you need to know

The emergency services and the UK government do not need your phone number to send you an alert. You will get alerts based on your current location – not where you live or work.

No one will collect or share data about you, your device or your location when you receive an alert. No personal information (such as telephone number, identity or location) is used in the sending of any Emergency Alert.

Emergency alerts are free and you do not need to sign up for them or download an app. You can opt out of some emergency alerts, but you should keep them switched on for your own safety.

To opt out of Emergency Alerts

  • Search your settings for ‘emergency alerts’.
  • Turn off ‘severe alerts’ and ‘extreme alerts’.

Phone handsets and devices

Make sure your device has all the latest software updates. Emergency alerts work on iPhones running iOS 14.5 or later and Android phones and tablets running Android 11 or later.

Factors which might mean you will not receive an alert

There are some factors which might mean you will not receive an alert. These include:

  • A device needs to be on 4G or 5G to receive the alert. To note, a device that is normally on 4G or 5G can often connect to a 3G or a 2G signal inside buildings.
  • The device does not have the latest software update or the software update has not been released (older devices have a slower update cycle).
  • The device is not able to receive the alerts as it is no longer supported.
  • The device is not a 4G-enabled device.
  • The device was switched off. Although if you are in proximity to a cellular tower when the alert is broadcast, you will receive the alert when your phone is switched back on.
  • The device was not connected to a mast broadcasting the Emergency Alert.