Get ready for the emergency alert test

The UK government is testing the emergency alerts system on Sunday 7 September 2025 at 3pm.

Your mobile phone or tablet will vibrate and make a loud siren-like sound, even if it’s set on silent. The alert message will confirm this is a test and that you do not need to take any further action.

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.

You can opt out of the emergency alerts, including the national test, but you should keep them switched on for your own safety.

You can opt out of emergency alerts. Victims of domestic abuse with a hidden mobile phone may not wish the sound of the alert to draw attention to the phone. You can turn off your phone before this time or adjust your phone settings to opt out.

GOV.UK – Opting out of emergency alerts