A UK wide test of the Emergency Alert System will take place this Sunday 23rd April at 3.00pm.
This alarm will sound on all phones and tablets which have 4G or 5G capabilities, causing a loud siren-like sound and causing devices to vibrate.
The system is designed to notify people of extreme weather events, or of other life threatening emergencies.
If for any reason you do not wish to receive the alert on Sunday, you should switch your device off. Please be aware that alert will still sound if your phone is on silent.
If you want to switch off the alerts completely, you can do so through the settings on your device: Search for Emergency Alerts and then turn off Severe and Emergency Alerts.
The domestic abuse charity, Refuge, has created a video, with more detailed instructions, which you can view here: https://youtu.be/I2MBcHwmiy8.