There is a certain road in Bromley, about 5 minutes walk from the town centre, where although it is pay and display parking bays, due to unknown reasons, the traffic wardens are not allowed to issue tickets if you are parked in a bay without paying but are allowed to issue tickets if you park on the yellow lines. If you do get a ticket for parking in a bay without paying, you just appeal it with the council mentioning the name of the road and it's cancelled. Fantastic at this time of year, no car park queueing.