The marine told investigators he found the round in the field about a year ago and kept it, thinking it wasn't live. Due to extensive rust and corrosion, the round's original identifying paint markings were no longer visible, making it difficult to determine whether it was an inert training munition or a live explosive device.
This highly organised gang thought they were outsmarting the police and prison authorities. What they didn't know is they were subject to sustained specialist surveillance by Met officers. All seven men admitted their roles in a serious, organised, and prolific enterprise to supply Class B and C drugs, and conveying list A and B articles into prisons.
In-flight Wi-Fi is roughly on par with hotel or airport Wi-Fi. It's not automatically unsafe, but it's not something you should blindly trust either. You're on a shared network with hundreds of other people, and you don't know how well it's segmented or monitored.