The UK government has announced another UK emergency alert test for smartphones. On 7 September at 15:00 BST, millions of phones will sound a loud siren and vibrate for 10 seconds. Even silent devices will receive the alert, displaying a test message.
This UK emergency alert test aims to prepare the public for real emergencies. The system warns of life-threatening dangers like extreme weather or terror attacks. However, a 2023 trial revealed technical glitches, prompting this new test.
Only 4G and 5G smartphones will get the alert. Older phones or those on 2G/3G networks will not receive it. Devices must be turned on and not in airplane mode. If a phone is offline, it will still get the message.
Last year, some users reported issues. Many on the Three network missed the alert, while others got it multiple times. About 7% of compatible devices failed to receive it. The government has since worked to fix these problems.
The system has already helped in real crises. During Storm Eowyn in January 2025, it warned 4.5 million people in Scotland and Northern Ireland. Similarly, Storm Darragh triggered alerts for 3.5 million in England and Wales.
Additionally, Plymouth used the system during a WWII bomb scare. Over 10,000 residents evacuated safely after receiving clear instructions. Local officials praised the alerts for providing critical updates.
Domestic abuse charities have raised concerns. Hidden phones could be discovered if an alert goes off. The National Centre for Domestic Violence advises turning off concealed devices during the test.
However, the government urges most users to keep alerts enabled. They have also published safety guides for vulnerable individuals. A public awareness campaign will explain the test beforehand.
Cabinet Office minister Pat McFadden compared the system to a fire alarm. Regular checks ensure it works when needed. The UK follows other countries like the US and Japan, which use similar alerts.
As the UK emergency alert test approaches, officials stress its importance. The goal is to keep people safe during major emergencies. With better technology and public awareness, the system aims to protect lives nationwide.
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