I really dint think it’s cosmetic surgery. I think that if it turned out that it were something trivial like facelift that had caused her to skive since mid-December, and William had shirked for more than three months in sympathy, taxpayer goodwill would dry up quickly. They know this. Surely they’re not arrogant enough to believe that it would be ok.
Also, if I were elderly Camilla or Anne picking up the bulk of the work in Charles’ (justifiable) absence whilst that pair chilled out at home for a silly reason like that, I’d be leaking the truth like a sieve tbh.
I think she’s been genuinely unwell. Whether mental or physical or a mix of both, who knows. She’ll divulge the story if and when she feels ready.
As for the footage, I thought it was her but changed my mind. But that’s just one person’s opinion. Other opinions are available and are no more or less valid.