UK National Emergency Alert Test - 23rd April 2023

UK National Emergency Alert Test - 23rd April 2023

Public Emergency Alert Test to be sent to all UK smartphones Sunday, 23rd April.

A siren-like alert will be sent to every UK smartphone on all 4G and 5G phone networks in the early evening of Sunday, 23rd April, to test a new government public warning system. (this excludes "non-smart" phones).

A message will appear on the home screen of your device/s during the test, with vibration and a loud warning sound that will ring for about 10 seconds, even if the phone is on silent. You will have to acknowledge the alert before you can use other features on your devices.

The system is modelled on similar schemes in the US, Canada, Japan and The Netherlands. It will allow the government and emergency services to send urgent messages warning of life-threatening situations near you, like flooding or wildfires.

If you live with domestic abuse and have a 'hidden' phone for emergencies, switch your phone OFF on Sunday 23rd afternoon to avoid detection. 

For all media enquiries, please contact the SecuriGroup Communications team at

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