yeah he's tried that. the dispute is that he was told he picked up, then his next cr states that there is no recommendation because he had picked up. mcm are now saying that he picked up a year later. so he's trying to clarify it as he believes( and his last oc) that he waited 15 months between picking up and getting it, and is trying to redress the various problems that came from that, seniority etc etc.
Your mate needs Corps Orders rather than Board Results, boards tell you that you've been selected, not the date of promotion.
This information is held at Glasgow, a phonecall from his OC should sort out the problem, they can fax te Corps Order if required.