Looking at your photo, taken from their video, this is the most outrageous PCN I have ever seen for a YBJ. The car is clear of the YBJ with the rear wheel only touching the yellow line, not even over it. However we need to see the video and going onto Hounslow's website, it doesn't recognise the PCN number, so has your neighbour now paid the PCN ? If he has then it is game over, sorry.