Forget wild theories. I hear the truth is much simpler.
It centres on the loyalty of the current Master to the previous Master. (Avoiding embarrassment to him.)
The original letter from the previous Master, Sqn Leader Chris Ford,is completely different to that penned by the current Master, Captain Peter Benn,who was responsible for the latest citation.
He also issued an interim citation (which is different to 1 and 3) to a tabloid journalist some months ago.
Here is the original once again with no mention of ' Co-pilot Ewald Gritsch. I understand very few people inside the upper eschelons of HCAP have seen this letter as I presume they do not wander the grubby streets of Pprune.