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Millions of phones sound sirens as government tests emergency alert system

The UK government tested its emergency alert system by sending siren sounds and messages to millions of mobile phones to improve readiness for national crises, Prime Minister said.

  • On Sunday, September 7, a nationwide test of the government’s emergency alert system caused countless mobile devices throughout the UK to sound a siren and vibrate simultaneously.
  • The test followed a first trial in April 2023 and supports a 2023 Resilience Action Plan addressing national threats like extreme weather and cyberattacks.
  • At 3 pm, a 10-second alert was sent to phones using the latest mobile network technology, briefly interrupting various sports events such as cricket, football, and rugby matches.
  • The government official in charge of work and pensions referred to the alerts as a "national fire alarm" that necessitates regular practice drills, while a social media user named Breakwell described the test as startling, likening it to an incoming nuclear strike.
  • The government intends to make ongoing improvements to maintain system dependability during emergencies and emphasizes that users have the option to disable alerts, an important consideration for individuals in abusive situations who keep their phones hidden.
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Emergency Alert test: will there be another Emergency Alert test in the UK? Full details

The Emergency Alert test took place on Sunday afternoon πŸš¨πŸ“±

Β·United Kingdom
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NewsLetter UK broke the news in Portadown, United Kingdom on Sunday, September 7, 2025.
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