On Sunday 23rd April 2023 at 3pm, there will be a national test of the UK Emergency Alerts service to mobile phones and tablets. As this is a test, you need take no action.
Emergency Alerts is a UK Government service to warn you if there’s danger to life nearby.
You can read more about this service here [but if you are, say, at the Ben Goble concert DO please have your device turned off, or in flight mode!]
Emergency alerts work on:
iPhones running iOS 14.5 or later
Android phones and tablets running Android 11 or later
[Other devices, as they say, are available too!]