It's not so easy to bury what they want to anymore.... it does make me wonder about decades ago, before SM, what we don't know
It's not really that long since the deal was struck with the Fleet St editors to hide the stories about Edward VIII and Wallis Simpson from the British public.
There's even a little clip of her at the window with him at his proclamation that has an overlay of "Not to be used, by order of King Edward".
Although it's for very different reasons there's the agreement at the moment about the royal children and not photographing the families when they are out and about. You see more photos of the Cambridges and the Wessexes etc out doing normal family stuff in magazines abroad than you do here.
It's unlikely they'd suppress other things, but you never know really.