The UK Government has confirmed that a nationwide emergency alert test will take place on Sunday, 7 September at 3pm, with all 4G and 5G connected mobile phones set to emit a loud siren and vibration for up to 10 seconds.

The test is part of the Emergency Alerts system, designed to warn the public about nearby life-threatening dangers, including severe flooding, fires, or extreme weather.
 Stay Informed. Stay Safe.
This alert test is not a cause for alarm, but a crucial step in preparing the nation for real emergencies. Mark your calendars for 3pm on Sunday 7 September 2025.

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