If you have a mobile phone, you will receive an emergency alert from the Government at 3pm today - but there is a way to turn it off if you wish to do so.
The message will be received by every 4G and 5G device across the UK. It is being sent out to test a new public alert system, which intends to warn people about life-threatening situations such as flooding and wildfires.
The message, which will pop up on phones as a notification, accompanied by a siren sound and a vibration, will read: "This is a test of Emergency Alerts, a new UK government service that will warn you if there’s a life-threatening emergency nearby. In a real emergency, follow the instructions in the alert to keep yourself and others safe. Visit gov.uk/alerts for more information. This is a test. You do not need to take any action."