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?

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

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 not yet publicly tested the mobile phone-based SMS emergency warning system which it implemented nearly two years ago.

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 ...

People are being reminded to "not take action" over nuclear emergency text messages which could be sent to some residents on ...