The Emergency Alert test – Sunday 23 April

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There will be a national test of the UK’s new Emergency Alerts system on Sunday April 23rd at 15:00.

The test alert 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. You can hear an example of what the test will look and sound like in this explainer video.