The UK government is looking to run a UK wide alert system test on the 23rd April 2023.
But in a wider context, some people that are in abuse situations have phones that are kept away and are not know to perpetrators. Now, if this alert goes off and the perpetrators finds other devices that they were not aware of, that may put the person suffering from abuse at further risk. If you know if anyone in this situation, please do bring it to their attention that they need to switch off their phone or have it in plane mode.
Below is the link for the alert itself and how alerts work (which includes the reasons why it wouldn’t work.)
This information could keep someone safe if shared.