I wonder whether the Tribunal actually pay any attention at all to the decision in the bunker - and I assume they actually don't - as the bunker has absolutely no information that is not equally available to the tribunal (who presumably have all the TV footage). i.e who cares what the bunker bloke made of it? - it's of no import, he's not on the panel.
Indeed, I suspect that the bunker doesn't even submit a report.
Don't forget the panel is the court of first instance, it's not an appeal court sitting over the bunker.
On the other hand, the tribunal probably does receive a referee's report as the referee was a close, impartial, witness who might conceivably have seen/heard something that wasn't clear on the TV footage.