The cascade of comms plus the media reaction gave clear signs.
That's going to be missed by most people, unless (like me) they are glued to social media and the news.
It was highly unusual when the queen missed the Privy council, when she had met Liz Truss the day before.
Then this morning there was an ominous message about her being "under medical supervision", but not being transported to hospital.
That hints at end of life because they don't normally issue statements about the queen's health unless it's significant.
If they were worried enough for that formal announcement, they'd potentially have transported to hospital, unless they weren't planning to treat.
A further statement was issued saying that the queen was comfortable and resting. That again fitted with end of life, and by that point the family were being airlifted in hurriedly.
It was clear by the tone of Nick Witchell and Huw Edwards that they were gently paving the way for further bad news.
Also, the way they cleared the schedules "till 6" suggested an announcement was expected at 6.
That my recollection of the days events. Obviously I've been glued to it. 😢