This weekend almost everyone in the UK with a mobile phone or tablet will be sent an emergency alert at 3pm on Sunday, April 23 as the Government carries out a national test.
You should expect to hear a siren sound (even if your device is on silent), while your phone may also vibrate and a message will appear on your phone screen. This should last around 10 seconds and your phone will be locked until you acknowledge the warning by pressing 'ok'.
The UK Emergency Alerts can be used to warn people about severe weather, flooding and fires and will normally be sent by emergency services or government departments/bodies.
