A reminder for anyone that has a "secret" mobile phone for any reason. Government Emergency Alerts system test. At 15:00 on Sunday 7 September, the UK government is testing the Emergency Alerts system. Compatible mobile phones will receive an alert, make a loud siren-like sound and vibrate. You will not need to take any action. The Emergency Alerts system is used to warn if there's a danger to life nearby, including extreme weather. Regular testing ensures the system is functioning correctly, should it need to be used in a life-threatening emergency.Find out more on the gov.uk website.https://www.gov.uk/alerts/opting-out#emergencyalertuk