Appeal was dismissed. C'est la vie.
Unfortunately I left myself very little time to write the skeleton argument/response to council submissions and so only uploaded it Monday morning 48 hours prior to the hearing. Already risking an adjournment but the council rep stated they had read it.
My argumentation re the camera certificate was probably not optimal so that fell by the wayside.
De minimis seemed to be a complete no go as well with this adjudicator. I was constantly reminded that if the vehicle was in the bus lane then a contravention occurred and that's all that needed to be decided regardless of intrusion distance. Likewise length of time before restriction end irrelevant.
The missing grounds identified by Phantom Crusader did hold some weight but not enough to amount to PI.
Thanks for all the guidance. Never attended the tribunal before so had some value as a learning process. At least the council had to actually work for their money.
Full decision below.