National Testing of the UK's new Emergency Alerts system - Sunday 23rd April 2023,15:00

The new Emergency Alerts system will be tested nationally on April 23rd.

The system will warn people when their lives are in danger. An Emergency Alert is a loud, siren-like sound with a message on your mobile phone screen.

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The test alert on 23 April will be sent to most mobile phones across the UK. Devices will make a distinct, siren-like sound for up to 10 seconds, including on phones switched to silent mode. Phones will also vibrate and display a message about the test. The aim is to alert the country to the test and reassure you that no action needs to be taken.

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