Millions of people across the UK will hear a loud alarm from their mobile phones, when a new 'Armageddon' alert is trialled within weeks.
The new UK-wide Emergency Alert system will be tested on Sunday, April 23 at 3pm, with Brits receiving a message to warn of danger to life nearby.
Messages will be sent out to 4G and 5G mobile phones, along with piercing sound and vibration for up to 10 seconds.