As I understand it, Ian, George and Roj have 20% of the club each (90k shares). As of the confirmation statement in February, Michelle had circa 105,000 shares, and she has the casting vote as chair.
Michelle has already sold some of her personal shares to fans over the past 18 months as I purchased some myself. I would imagine for any investment (Trust or otherwise) each member of the board would have to agree to equally dilute their shares.
I certainly sleep easier knowing she has the final say and really hope it stays this way.