This morning I found the photo page of someone’s passport on the pavement, it is current. No one would discard their own ID surely.
I picked it up (in a gloved hand) and carried on my walk, inventing scenarios in my head of what could have happened. My best conclusion is a DV case of a man ripping the passport up to prevent his partner travelling or leaving him.
Should I hand it in, it may be a burglary/robbery and be covered in prints.