Stewart sent the image on EncroChat, an encrypted messaging service used exclusively by criminals that was infiltrated by police in a major operation last year.

This sounds like usual CNN distortion. All encrypted networks are exclusively-criminal, and any who don't toe the globalist line are extremists. It looked as if the BBC article doesn't indict the service itself, but the original story on its infiltration calls it a "crime chat network." From that story:

The system operated on customised Android phones and, according to its website, provided "worry-free secure communications".

Customers had access to features such as self-destructing messages that deleted from the recipient's device after a certain length of time.

Real criminal masterminds selling Androids with custom ROMs.

The moral of the story is: when you take a picture of your cheese, don't hold it in your palm with your fingers splayed out as if you're signalling to your agency handler to recall you from the field. Just my two pence.