Prince Harry will attempt to scarper as soon as the King's Coronation is complete and will be well placed for a sharp exit, Paul Burrell believes.
The Duke - attending without wife Meghan Markle - will be forced to sit ten rows back, the former royal butler says.
Harry may not even have time to speak with his brother or father during his brief visit, it has been claimed, and will be "in and out in a flash".
He could fly in and out of the country in less than 24 hours over the Coronation weekend, sources say.
So not exactly having a front row seat won't be problem, Mr Burrell thinks.
Speaking to GB News, said: "It is not a surprise. He is coming to show face.
"He is coming to put his foot in the door. He is coming because his father wants him to be there.
"His father will be delighted that both his sons will be there to witness this incredible day in his life.
"But Harry is not going to hang around."
Princess Diana's former butler told presenter Dan Wootton: "He doesn't want to spend much time around them.
"There is no chance of a reconciliation anytime soon, I'm afraid - I think he will get a very icy reception from the Windsors.
"He will be sitting ten rows back. He will not even see his brother or his father in that time.
"He will be in and out in a flash."
Buckingham Palace last week said it was "pleased" to confirm Harry’s attendance, adding that his wife Meghan will be staying behind in California with their children, Prince Archie and Princess Lilibet.
However, Harry's possible brief visit means he would not stick around for the Coronation concert on Sunday.
Archie’s birthday falls on the same day as the Coronation on May 6 and it is reported the Duke may wish to return home quickly to celebrate it.
A royal source told The Mirror: “After much back and forth, Harry said that he would be returning for the King’s coronation but it will only be a fleeting visit.
“Organisers have been told Harry won’t be attending the concert with the rest of the royal family, which is a great shame as it will be such a spectacular event.”