The national system for sending emergency alerts to mobile phones in the UK is being tested for the second time.

The government will send out an emergency alert to millions of people across the UK on Sunday, September 7 - but how exactly does it work and how did they get your number?

Brits were previously told to 'keep your cool' as the emergency alert causes phones to emit a siren-like sound during the UK-wide test, which is only the second of its kind ...

The government has urged people to "keep their cool" when the national system for sending emergency alerts to mobile phones in the UK is tested on Sunday. At 15:00 BST, compatible phones will vibrate ...

We all knew it was coming, but the UK Government’s second nationwide emergency alert test to all mobile phones ... in July - came two years after the very first UK-wide test of the system back in ...