The timing of Harry’s trip to London is interesting.
The Times reported that the family members were told by Charles of his diagnosis last week, after it was discovered.But Harry only announces he’s coming tot he UK after it is announced publicly. I guess there a few possibilities to consider here.
Firstly, Harry wanted maximum publicity for the trip, so although he could have travelled privately last week, he waited until the Palace made its announcement before releasing his own statement, and ensuring the US paps knew when he’d be arriving at LAX etc.
Secondly, he unfortunately wasn’t able to travel last week before his father’s announcement, when it could have been done privately.
Thirdly, he thought that a trip by him to the UK would be picked up on by the Press and speculated on, so better to travel openly (although he normally manages to travel fairly regularly without coverage - see the Sussexes recent holidays and the trip to Jamaica).
Fourthly, the Palace didn’t trust Harry to keep his father’s condition secret so didn’t tell him until after the rest of the family (as when QEII died), so he travelled as soon as he had the opportunity to.
Lots of possible options! Who knows which is closest to the truth.