When Is the Next Emergency Alert Test UK 2025? – Date, Time and Key Facts

The UK government conducted its second nationwide Emergency Alert test on Sunday, 7 September 2025, at approximately 3:00 PM. The test targeted compatible mobile phones and tablets across the country, sending a loud siren and vibration lasting around 10 seconds to every eligible device. This national exercise formed part of broader efforts to ensure the public can receive timely warnings during genuine life-threatening emergencies.

The system, operated exclusively by government and emergency services, delivered an on-screen message confirming the message was a test requiring no action from recipients. Samsung and other manufacturers had issued advance notifications to their users ahead of the exercise, directing them to official government advice on preparation.

When is the Next UK Emergency Alert Test in 2025?

The national test took place on 7 September 2025 at 3:00 PM, representing the second nationwide exercise since the Emergency Alerts system was introduced. The Cabinet Office announced the test on 7 July 2025 through official government channels, linked to the Resilience Action Plan. The timing was selected to minimise disruption, occurring on a Sunday afternoon when most schools were closed and fewer people were engaged in work activities.

When Was the Last UK Emergency Alert Test?

The first national Emergency Alert test occurred in April 2023, marking the inaugural nationwide exercise of the system. Since that initial test, the government has deployed the alert system on five occasions for genuine emergencies, including during major weather events requiring immediate public action to protect life.

Storm Éowyn: The Largest Emergency Alert Deployment

The most significant use of the Emergency Alert system prior to the September 2025 test came during Storm Éowyn in January 2025. Following a red weather warning, the system reached 4.5 million people across Scotland and Northern Ireland. This deployment demonstrated the platform’s capacity to deliver urgent warnings at scale during life-threatening conditions.

Testing Practices Internationally

The UK approach aligns with established practices in Japan and the USA, where similar public warning systems undergo regular testing to maintain reliability and public familiarity. Government sources have committed to ongoing testing schedules, though specific future test dates beyond September 2025 have not been announced publicly.

How Do I Turn Off the UK Emergency Alert Test?

Users who wished to opt out of the Emergency Alert test could do so through their device settings before the exercise took place. However, authorities discouraged opting out except in specific circumstances where receiving the alert could pose a safety risk, such as for individuals experiencing domestic abuse.

Device Settings for Opting Out

Instructions for disabling emergency alerts were available through the official gov.uk website ahead of the test. Essex Police confirmed that opt-out options remained available, though the preference from public safety authorities was for the widest possible participation to ensure the system reaches everyone during genuine emergencies.

Exceptions for Vulnerable Groups

The public awareness campaign preceding the test included materials in British Sign Language specifically targeted at vulnerable groups. This approach recognised that while the alert system serves an essential protective function, certain individuals might face heightened risks from receiving emergency notifications without adequate support structures in place.

What Does the UK Emergency Alert System Sound Like?

The Emergency Alert produces a distinctive loud siren sound accompanied by vibration, lasting approximately 10 seconds. The alert is designed to cut through normal phone usage, overriding silent mode to ensure recipients notice the warning even when their device is set to quiet or do not disturb.

Visual Display on Devices

Alongside the audible siren, compatible devices displayed an on-screen message clearly identifying the notification as a test. The message explicitly stated that no action was required from the recipient. Samsung and other manufacturers included advance guidance in their communications, linking users to official government preparation advice.

Purpose of the Distinctive Sound

The recognisable sound was intentionally designed to signal genuine emergencies requiring immediate attention. Research into public warning systems indicates that distinctive, attention-grabbing alerts improve response times during crises. Regular testing helps ensure the public associates the sound with urgent safety information rather than dismissing it as spam or a routine notification.

Timeline of Emergency Alert Tests and Deployments

1. April 2023 — First national test of the Emergency Alerts system across the UK.
2. January 2025 — Storm Éowyn prompted the largest deployment, reaching 4.5 million people in Scotland and Northern Ireland following a red weather warning.
3. 7 July 2025 — Cabinet Office published the official announcement for the September 2025 national test, tied to the Resilience Action Plan.
4. 7 September 2025, 3:00 PM — Second nationwide Emergency Alert test conducted.

Confirmed and Unconfirmed Information

Background: The Emergency Alerts System

The UK Emergency Alerts system enables government and emergency services to send notifications directly to mobile phones and tablets within a defined geographic area. The platform was designed to warn of nearby dangers to life, including extreme weather events, flooding, and other rapidly developing emergencies requiring immediate public action.

The September 2025 test formed part of the government’s Resilience Action Plan, reflecting international best practice established in countries including Japan and the USA. Regular testing ensures the system functions correctly and that the public remains familiar with the alert format and sound.

Official Sources and Statements

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

— Cabinet Office, official government announcement published 7 July 2025

On Sunday 7 September 2025 at 3pm, the government will carry out a national test of the Emergency Alerts system.

— Education Hub, government blog

What Happens After the Test?

Following the September 2025 test, the Emergency Alerts system remains active for genuine emergencies requiring immediate public warning. The government has committed to regular testing to maintain system reliability and public familiarity, though no specific dates for future exercises have been announced.

Those seeking the latest information on future tests should monitor official government channels, including the Cabinet Office announcements and the Education Hub blog.

The WASPI campaign and related government decisions continue to attract public attention. For context on separate government compensation discussions, see the coverage of When Will WASPI Get a Decision – Government Rejects Compensation Again.

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