King Charles received a very touching nod, quite literally, at Trooping the Colour from Prince George, Princess Charlotte and Prince Louis.

And it was their mum, the Princess of Wales, who made sure the youngsters got the sweet tribute right.

As the Ascot Landau carriage carrying the Princess and her children approached the dais outside Buckingham Palace where The King was taking a salute, the three children all bowed their heads.

It was a sweet gesture to their grandfather who was marking his official birthday. The Sovereign’s Birthday Parade, known as Trooping the Colour, is the traditional celebration. This year, the Coldstream Guards trooped their colour.

Prince George, 11, Princess Charlotte, 10 and 7 year old Prince Louis had earlier travelled to Horse Guards Parade by carriage with the Princess of Wales to watch Trooping the Colour.

While the Princess joined King Charles and Queen Camilla on the main dais, an honoured position for Catherine, her children enjoyed the ceremony from inside a building overlooking Horse Guards.

Later, they joined the whole Royal Family on the balcony for a flypast which included a spectacular display by the Red Arrows.

And Prince Louis couldn’t resist chatting happily to his grandfather who he has a special bond with.

Trooping comes at the start of a busy time for the Royal Family who will next be together at Windsor in just a few days time for the Order of the Garter.