[sbe-eas] UK nationwide alert test problems

[Sean Donelan]

The United Kingdom performed a nationwide emergency alert test on Sunday, 
April 23, 2023.

https://www.lightreading.com/security/eurobites-uk-mass-alerts-test-sounds-bum-note/d/d-id/784505?

The UK government's test of its smartphone-based emergency alerts system 
over the weekend proved to be less than a resounding success, as the vast 
majority of Three's customers – and others – failed to receive their 
notification, which was sent using Cell Broadcast technology. Everyone 
with a mobile phone was supposed to receive the alert – comprising a 
ten-second siren noise and link to further information – although the test 
had caused controversy before it had even started, with some of those 
working with women suffering "coercive control"-type domestic abuse 
warning that it could create problems for those with hidden "secret" 
backup phones.