The UK's Emergency Alert system is being tested this weekend , with an alarm set to be sent to millions of devices across the country.

A nationwide test of the alert will enable the government to check that the system is working as it should, and that in the case of a real emergency people will be successfully notified.

The system has been tested on a nationwide basis once previously, in April 2023, and has since been deployed five times in emergency scenarios such as Storm Darragh in December 2024 when wind gusts caused dangerous conditions in parts of the country.

Back when the alert system was tested in 2023, some mobile phones on the Three network did not receive the alert. After the test, the government said it would resolve the issues so that the alert will be sent to everyone.

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