Many years ago while in the RAF I was posted to RAF Wittering on the A1 near Stamford. My family lived in Slough up the A4 so I would get lifts to London, or thumb it, and get a bus or train to home. One of the guys I travelled with, Ed, had an 'Auntie' Rover and since he was a National Serviceman we wondered how he could afford to run it. We were travelling up the A1 one Sunday night when we were pulled over by a police car who advised the Ed that his offside rear light was out and could he swap the rear light bulbs over for which he was loaned a screwdriver.
Job done and with that second sight that policeman have he asked to see in the boot. Calm as you like Ed opened the boot to reveal a One Armed Bandit, an illegal, at the time, gaming machine. " And what are you doing with that." asked the policeman. " It's a present for my Grandmother in Doncaster." replied Ed. " Oh that's OK." said the policeman, " Get that other light fixed, off you go."
It transpired that Ed was delivering one armed bandits to working mens clubs up north from suppliers in London.