The clue 'night shift' suggests that it is the car facing the wrong way that might be done, although he'd have to be within a certain distance of a junction.
I'm going to give you this one Ian as you spotted it straight away with your first guess.
PC Plod comes along in the evening spots the double parking obstruction but also sees that the driver on the right is illegally parked
RULE 248
You MUST NOT park on a road at night facing against the direction of the traffic flow unless in a recognised parking space. (That's why your car's reflectors are at the rear of the vehicle)He knows where the driver lives and calls at his house. He explains why the car is illegally parked and politely asks him to remove it immediately and to park it so that it is not facing the flow of oncoming traffic and
also not double parked. He also intends to speak to the other driver when he next sees him
Knowing the Highway Code but applying common sense is a win win situation for PC Plod who has no paperwork etc to waste his valuable time and the drivers have also been educated for the future.
That's how I know the small photo has been staged and also because it happened to my Father (not the double parking bit) over 30 years ago.