The UK government is testing the Emergency Alerts system on Sunday 7th September 2025 at 3pm

The test will be sent to all compatible 4G and 5G mobile phones and tablets across the UK. You will hear a loud siren-like sound, vibration, and a message will appear on the screen confirming that it is a test. The sound and vibration will last for about 10 seconds. You will not need to take any further action.

The Emergency Alerts system is used to warn if there’s a danger to life nearby, including extreme weather. Regular testing ensures the system is functioning correctly, should it need to be used in a life-threatening emergency. Find out more at gov.uk/alerts.

The Emergency Alerts system is an important tool for reaching the public in emergency situations. However, for those who need it, information on how to opt out is available on gov.uk/alerts. You can also learn about how to prepare for an emergency at gov.uk/prepare.