The move by the President of France, Emanuel Macron, to walk in front of King Charles during a cavalry inspection at Windsor Castle has provoked strong reactions in Britain.

Donald Trump might have wanted a grander welcome to the UK than what King Charles was expecting. The POTUS "Manu Regia," written by Charles, was hand-delivered to Trump's desk. Buckingham Palace confirmed an invitation signed by the King was sent overseas.

King Charles has written to President Trump expressing his "profound sadness" at the tragic loss of life in Texas. His Majesty offered his deepest sympathy to all families who have lost loved ones and paid tribute to the courage and selflessness of the emergency services and volunteers working to save lives.

According to BBC, Buckingham Palace has confirmed that King Charles sent Trump a formal letter called a "Manu Regia" inviting him to the U.K. last week, which was delivered to Washington via representatives from the British Embassy.

Britain's King Charles and Queen Camilla attended an exhibition on Wednesday (July 9) celebrating 40 years of artists accompanying official overseas visits.

King Charles shared a message of support in a letter to Donald Trump amid the devastating flash floods occurring in Texas, which have claimed the lives of at least 100 people. See details.

Emmanuel Macron has seemingly broken royal protocol with King Charles III during his state visit to the UK - and people are now comparing him to Donald Trump. The French President, 47, and his wife Brigitte, 72, are currently in the middle of their three-day-trip to the English capital.