I have built up a rapport with the traffic wardens in my locality.
I have had the odd parking ticket, but that was when I first changed my van.
I try not to take the pee, but they are certainly very lenient with me when I'm on a loading bay longer than I should be or when the on-street ticket I bought has expired.
I talked my way out of a ticket once by being polite and acknowledging that I shouldn't have parked where I had. The warden had started to write the ticket, but backtracked and spoke to the council office and had it cancelled.
John