It was not immediately clear how UK authorities were alerted to the message, with the judge noting "they were not the subject of evidence in this trial".

A literal "We're not the ones on trial here!" Holy shit.

Snapchat is not end-to-end encrypted, so they saw the message and notified the authorities. So yes, exactly.

"Intercepted while the plane was over England through unknown reasons" my ass lmao.

That was a big question during the trial, too

Uh Snapchat already does that. Nothing about it is encrypted. And deleted messages are only deleted from your device, not snapchats servers.