One of my old colleagues got stopped by a motor cycle policeman a number of years ago on the A3 up to Petersfield, as he was travelling above the speed limit. It was obvious to the policeman that "Pongo" (ex RAF) was no speedster and it was suspected that the speedo was inaccurate. So with Pongo in the lead they set off and at 30, 40, 50, 60 and 70 MPH, the policeman flashed his lights so that Pongo could mark his speed to indicate those speeds. After
a short friendly exchange to confirm the findings, he was let off on his way with a friendly wave. I like to think that the vast majority of our police service are good folk.