Royal events attended by Prince William and Prince Harry have become rare since their feud became public, though last June the brothers were together to honour their late grandmother during the Platinum Jubilee celebrations.
It was Harry and Meghan's first public appearance at a royal event since leaving the monarchy, and despite coming together for the event the brothers were sat some distance apart. It made for a tense service, reports the Mirror.
After the service, William and Kate were seen talking on the steps of the cathedral. The couple were waiting for their car to take them to Guildhall, for the lunch reception.
READ MORE - Woman leaves husband after discovering he uses foodbanks on £160k income
And a lipreader has revealed what he believes they said during their exchange, which included a clear instruction for Kate from William.
According to lip reading expert John Cassidy, as they emerged on to the steps, Kate remarked on the service saying: "It went very well, very well" with William replying: "Yes, perfect."
Afterwards, William could be seen waving to the crowd saying hello, and Mr Cassidy says the prince then turned to Kate and said: "Wait for that to move, then we can go."
Meanwhile, a body language expert who looked at the couples at the same event believes William gave Harry the "opposite of an acknowledgement" and a "barrier gesture".
Body language expert Judi James told the Mirror that William adopted a "barrier gesture" as he and wife Kate walked past the pew where his brother sat on the way to his seat.
Judi explained: "Harry looked firmly resigned to the back row here and was not sitting behind his brother as he was for the last service of remembrance.
"Harry’s expression did suggest some relief as he joked with Zara as he searched for his car on the way out and he threw a wide, open-mouthed grin in her direction from the pews, but otherwise he fell into a haunted eye expression with some rapid blinking to suggest inner anxiety, leaning in and down to Meghan when she spoke as though keen to get some support.
"There was the opposite to an acknowledgement from William as he walked past Harry’s row during the parade out of the service.
"Sucking in his lips and with his chin pulled up in a gesture of resolve he appeared to turn his head in the other direction for a moment, raising his order of service high in a barrier gesture."
After the Jubilee last summer, William and Harry were forced together just months later after the death of their late grandmother the Queen.
They even joined together with their wives Kate and Meghan to carry out a joint walkabout in Windsor to look at floral tributes and greet thousands of well-wishers.
But despite the seeming temporary truce, it appears their bond has further deteriorated after Harry and Meghan's Netflix series and Harry's controversial memoir Spare.
READ NEXT:
Edinburgh man charged with murder of 'much-loved father' who died in Leith housing scheme
West Lothian school pals leave heartbreaking tributes to Hamdan Aslam following shock death
Edinburgh residents fume at 'ridiculous' cycle lane that puts 'riders into oncoming traffic'
Edinburgh experts use AI to show what the city looks and feels like to kids
Edinburgh set for Scottish Rum Festival with tasting sessions and masterclasses
