None of the vehicles shown below will ever get a parking ticket, even though they are parked on the pavement and are causing an obstruction.
Park with two wheels on the kerb from the road side and you can get a ticket. Park on the pavement with the front of your vehicle parked on private land and the parking attendants have no powers. It's an absurd loophole which Transport for London has never bothered to address during the 33 years in which the Greater London footway parking ban has been operating.