Sounds like the Queen is on the way out. She’s probably been worse than reported for some time.
But speaking as an historian, the language used in these announcements falls considerably short of those that have been used in the past if a monarch is actually dying.
For example, in 1936 - the last time a Monarch did not die suddenly, the language used in announcements included phrases like "The King's life is moving peacefully toward its close."
Historically, they do not cloud these things in euphemism.
But any illness is serious in a ninety-six year old woman.
We just saw her with the new prime minister. She looks great except her hand did look red and swollen.