You’re meant to park at least one metre away from other cars, I guess so they have a chance of getting out of their parking spot:
If parking bays are not marked, you must leave at least one metre between your vehicle and those in front and behind.
But how does anybody get booked for breaking that rule? How would a parking inspector know who had done the wrong thing?
That’s my car on the left. Nobody else was there when I parked; I came back to find the other car behind me. There was plenty of space — a driveway if I recall correctly — in front. So it wasn’t a problem.