A royal disaster.

King Charles’s less-than-impressed reaction to a royal aide has been revealed by an expert lip reader following a heated exchange during the pair’s official trip to the Channel Islands on Monday.

The monarch, 75, was visibly frustrated with a staffer who left his wife, Queen Camilla, struggling to put her coat on in stormy weather.

The King has a heated exchange with a staffer during the pair’s official trip to the Channel Islands on Monday. Government of Jersey / YouTube

Charles told his wife to “move your arm through the back,” before turning to his aide and yelling, “Come and help her!” expert lip reader Jacqui Press told the Daily Mail.

Video footage of the exchange showed Camilla struggling to put her jacket on as Charles, who was holding an umbrella, attempted to lend a helping hand.

Camilla, who turns 77 today, was meeting members of the public in St. Helier during the pair’s two-day visit to Jersey.

Their Majesties’ trip was not without drama as Charles and Camilla were both rushed to safety at one point during their royal engagement.

The monarch, 75, was visibly frustrated with an aide who left his wife struggling to put her coat on in stormy weather. Government of Jersey / YouTube

The outing was cut short over safety concerns as their security team ushered them into the nearby Pomme d’Or hotel.

Personal protection officers subtly signaled to their team that the royals were to immediately leave the premises.

The perceived threat is believed to have been a drone, however reports remain unconfirmed.

The couple met members of the public in St. Helier during their two-day visit to Jersey. Mirrorpix / MEGA

It’s understood that every precaution was taken after the couple’s security team discovered a “small issue of concern.”

A full background check was carried out and the King and Queen resumed their engagement shortly after it was safe for them to do so.

The false alarm came just days after a would-be assassin shot former President Donald Trump at a Pennsylvania campaign rally over the weekend.

A sniper had managed to climb onto the roof of a manufacturing plant 130 yards away from where Trump was speaking and opened fire on the Republican presidential candidate.

The King, 75, was ushered into the nearby Pomme d’Or hotel by his security team. ZUMAPRESS.com

Charles has since reached out to Trump and wrote a private letter to him that was delivered Sunday via the United Kingdom’s embassy in Washington, DC.

The palace did not provide details about the contents of the message.