Millions of people across the UK will hear a loud siren from their mobile phones in a major test of the emergency alert system. The "Armageddon alert", which was first trialled in 2023, is sent to ...

The government’s emergency alert siren is due to be tested again this year, triggering a 10-second siren that will be emitted from millions of phones. The system was first launched in 2023 to alert ...