The C-suite turnover at Invictus presents a communist party's worth of red flags to any auditor, and I would wager something is up in the finances. Unlike Sentebale which is a small charity in one small and far-away market, a scandal at Invictus would cause international problems as veterans from multiple countries compete. In the event Invictus has a scandal around cash and veterans, there is no way H can remain as Patron.
Given H's track record and what we know if his behavior at Sentebale from Dr. Chandauka (misusing private charity resources for personal gain), it seems unlikely to me that Invictus books are spic and span.
In the wake of a financial scandal, there is nothing the SS can say/do that won't be dismissed as part of the sewage that is social media trolling. The SS can't move the dial of public opinion any more in either the UK market (relevant to the RF) or the US market (relevant to H&M).
It is all firmly baked into current polling with gradual attrition of H&M's support as young idealists at Megxit grow older, enter into long-term relationships and get first-hand experience of the minefield that is in-law relations.