Most of those parked (except for the Van) were on the same training course at the venue. Nobody else got a ticket.

My wife has received a PCN from a Harrow Council civil enforcement officer, saying she was parked outside the parking bay markings where she parked. This was because a van had been parked similarly before the other drivers arrived and parked. The other drivers arriving to park were also having to park ouside their bay markings. None were grossly over their bay markings to take out a parking bay or to cause a danger to other drivers. Only my wife's car received a PCN. No video or photographic evidence is included with the Council's PCN record so there is no visual evidence from the Council to back up their officer's claim. My wife has a photo of another car similarly parked that did not have a PCN fixed to the windscreen and a witness statement confirming the details of the whole situation. What are the reasonable grounds for an appeal and is it likely that the PCN will be cancelled?