The UK Government will be running a national test of the Emergency Alerts system on Sunday 7 September 2025 at 3pm.
The test is not intended to alert you to real danger and you will not need to take any further action.
Your mobile phone or tablet may:
- make a loud siren-like sound, even if it’s set on silent
- vibrate
- read out the alert
The sound and vibration will last for about 10 seconds.
The test alert will be sent to all compatible 4G and 5G mobile phones and compatible tablets across the UK.
This follows the first successful national test in April 2023.
Information about the upcoming national test is available in British Sign Language (BSL) and Easy Read formats.







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