The moment alert sirens start on phones across the UK

Name: The moment alert sirens start on phones across the UK
Uploaded: 2023-04-23T21:47:16.000Z
Duration: 59 s
Description: Alerts began sounding just before 15:00 BST, though some people didn't receive one at all.

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Alerts began sounding just before 15:00 BST, though some people didn't receive one at all.

This video has been optimised for mobile viewing on the BBC News app. The BBC News app is available for iPhone and Android.

23 April 2023