Yet it seems the younger royals appeared somewhat uncertain regarding the appropriate protocol while on the balcony. Lip reader Jeremy Freeman exclusively told us just as the Red Arrows passed overhead, signalling the conclusion of the occasion. According to Jeremy, Princess Charlotte was seen turning round and asking: “Time to wave?” Charles then responded, seemingly addressing everyone, by saying: “Very good. Now we give a wave.”

Louis was subsequently observed turning to his father William and enquiring: “Is there more?” The second-in-line to the throne reinforced his own father’s instruction by responding: “No, that’s it. Go on wave, that’s it.”

It wasn’t the only significant exchange captured by lip readers during today’s Trooping. Jeremy noted one conversation between Louis and Kate that seemingly demonstrated he had been taking lessons from his brother Prince George.

“With no Beatrice or Eugenie, the face of the Firm looked emphatic and undiluted. There was even The Duke of Kent there to symbolise the generation before and maybe show the resilience and stoicism of that generation as he is still working in his nineties.”

One royal who was, predictably, nowhere to be found was the disgraced Andrew Mountbatten-Windsor. Just hours before proceedings got underway, he was photographed  sporting a mysterious bruised face while still loitering nearby.

His daughters Princess Eugenie and Princess Beatrice were likewise absent from the occasion, as the King continues his efforts to streamline the monarchy.