I had a load of birthday cards stolen last year. They came from all over the country, and had been posted a couple of days before, so I’m guessing that the place they would have all come together was in the local sorting office for delivery. And it’s here that some light fingered person decided to half inch them, along with the cash and cheque contents.
Raised a complaint with royal mail as did the people who sent them. Was told it would be investigated. Bugger all happened. I guess if you practically have a monopoly on sorting and delivering mail, you can do what the hell you like, and f*ck the consequences.