WINDSOR, England — Former U.S. President Donald Trump is once again under fire for his behavior during a high-profile meeting with the British royal family, after appearing to breach long-standing royal protocol during a ceremonial welcome with King Charles III.

The 47th president and former First Lady Melania Trump arrived in Windsor on Tuesday, where they were formally greeted by the Prince and Princess of Wales before being introduced to the King and Queen

While the initial exchange between Trump and Charles seemed warm, one particular moment drew criticism — when Trump walked in front of the monarch during an inspection of the guard of honor.

Royal protocol dictates that members of the public — including world leaders — should walk behind the King, in accordance with his role as monarch and head of state. Instead, Trump was seen striding slightly ahead of Charles while chatting casually with one of the guards, leaving the King trailing just behind him. READ MORE BELOW