I think she seems in amazing health, especially for a lady of her age. She's still driving around, walking her dogs everyday, doing State business and a host more. Maybe her weight loss is simply down to not having to attend so many official dinners since lockdown, or its a concerted effort for health reasons.
Yes. Truth to be told she had been growing bit stout over the years. Extra weight is very hard on your back and she has been known to have back problems. She went a little too far with the weight loss and has now settled back into what looks like her proper weight. IMHO.
I do think Phillip was far more ill for a longer period of time than we know. The BRF has never been really forthcoming about illness - which after all is their private business if they wish it to be. With the pandemic and lockdowns in place, I think HM began her mourning for Phillip far earlier than we thought.
Which I do think explains a bit about her high spiritedness now. She also knows Phillip is free from pain, illness and disability which he hated.
I am glad she is back, in seeming good health and spirits. Long may she reign.