I'm pretty sure Ferguson sought legal advise around this conflict of interest thing and the fact that he had shares in AJN prior to all this AJN bubbling up then and has since resigned then there is zero conflict of interest ; Ring ALLENS legal for $800 for 5 minutes or ring Solicitors'R'us on 1800 SOLICITORSRUS and they'll tell you the same for $20
Also Directors don't have to provide reasons to the market as to why they resigned
Here is AJNs buy and sell side