There are several no-nos to avoid when you’re a prison officer. Letting the inmates out for a picnic is one. Swapping places with the prisoners and pretending you’re in some kind of Bizarro World is another. Befriending them on Facebook is another equally stupid sounding mistake, but one that a Leicestershire prison officer was sacked over.

An investigation into Nathan Singh was initiated when he was suspected of providing mobile phones and other such banned items to inmates. He was really caught bang to right when it was discovered that amongst his Facebook friends were 13 criminals, even though they didn’t find any evidence of his alleged smuggling. He was sacked for gross misconduct as a result.