The key words are;
and that he "seemed to be fully aware of his surroundings,
makes one believe there was no documented loss of consciousness. (a Coma score of 13 is acceptable), even though the patient may be incoherent through alcohol, or any drugs be they administered post trauma, illicit or otherwise. He was obviously ambulatory and as such was vindicated by The AAT.
One wonders why it got that far in the first place, The CAA medico's should have known the rules, they made them.
A different bird from a different nest than what the Coroner is now dealing with.