Looking at the photo on the PCN, the YBJ extends beyond the junction, and you car is stopped with part of it in that extended part. Appeals have been won at London Tribunal on this issue. A YBJ can be installed "at the junction of two or more roads". The box here is too long, basically. Needless to say, Barnet won't accept any reps on this, all they want is your money, so you'd have to risk the full PCN penalty at London Tribunals with a fairly good chance of a win, but there is no guarantee of it.
