Trump criticized for walking in front of Queen Elizabeth II at Windsor Castle

U.S. President Donald Trump’s highly-anticipated meeting with Queen Elizabeth II raised eyebrows with etiquette experts after their walk in Windsor Castle.

Trump briefly walked in front of the queen during a review of the troops.

In the encounter, Queen Elizabeth appears to gesture Trump forward.

He walks ahead, then promptly stops and the queen does an awkward sidestep around him.

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Royal commentator Richard Fitzwilliams told CNN Trump looked like "he might as well have been wandering up and down a golf course."

However, Fitzwilliams said Trump didn’t technically break protocol, but gave the impression of “dis-coordination.”

Credit: WPA Pool

Credit: WPA Pool

"It proves he (Trump) doesn't bother to rehearse, because he doesn't think he needs to," Fitzwilliams said.

Trump also caused a buzz when it appeared he kept the queen waiting for tea.

The 92-year-old Queen appeared to uncomfortably shift in her jacket and hat and check her watch while waiting for the Trumps.

Credit: WPA Pool

Credit: WPA Pool

CNN reports the Trumps were on time for tea, arriving at 5 p.m.

When Trump and First Lady Melania Trump first met the Queen at the beginning of their visit, they shook her hand, rather than bowing or curtsying -- after Queen Elizabeth offered her hand, first.

"The queen doesn't expect people to bow to her, though many choose to anyway," said CNN royal correspondent Max Foster.

Explore>>Related: Will Trump bow to the Queen? Here is how royal protocol works

Credit: WPA Pool

Credit: WPA Pool

Trump is the 12th U.S. president to visit the queen during her reign.

His visit has been marked with massive protests in London, including a massive Trump baby balloon.

Explore>>Related: Photos: Baby Trump balloon flies over London protests

Credit: Matt Dunham

Credit: Matt Dunham

Protesters also greeted Trump in Scotland on Saturday.

Credit: Jeff J Mitchell

Credit: Jeff J Mitchell

Trump spent Saturday afternoon at his golf resort, Turnberry, located in southwest Scotland.

Credit: Leon Neal

Credit: Leon Neal