Christmas Eve about ten years ago I was retrieving presents from my flat in Comely Bank. It was about 10pm (and all though the streets, not a creature was stirring...). Nowhere to park, so I doubled, ran up, back down, roughly 3 minutes. I had just finished writing a text to my mum that I was on my way (before starting the car back up) when a police car rolled alongside and asked me to move on as I was creating an obstruction.
Didn't have much luck there. A little later the next year I needed something and the streets were completely packed. It was about 11.30pm, In the end I parked on double yellows, remembering the 5 minute rule. I was in and out in plenty time for that, but somehow a warden had been there and done the deed on the windscreen.
I paid up (I knew I shouldn't have been parking there), but with the cheque sent a letter asking if I should have double parked instead because that's what I was specifically avoiding. I got a response saying that basically they (the council wardens) could do nothing about double parking as it was a police matter.
Don't think I've double parked, or got a ticket (deliberately*) since.
*twice I've paid for a bay to the maximum time allowed in the city centre, and had appointments run over, and come back to tickets. I think one was a job interview if memory serves. Would just take the bus these days.