Can you find me an airfield in any of the commonly used flight guides that doesn't say it's PPR?
Yes. My home base, Southend. You do need PPR outside normal hours, for No Radio flights, and for training flights - and it says so in the flight guide I use.
But for a PPL in a radio-equipped aircraft arriving during normal opening hours, there's no PPR. And lots do!
Including two 'erberts on Friday who managed to park, one using up two parking spaces, and the other blocking access to row 4 (the only row with available spaces in it). We had to park over among the hulks.
So I reckon it should say "PPR for Idiots".