A Buckingham Palace guard was spotted slipping and landing on his bottom while on duty.

Anthony Smith, 45, was visiting Buckingham Palace as part of a weekend away in London.

He happened to be filming a visit to the iconic palace last Sunday (18) when an unexpected scene unfolded.

The video shows the moment the guard's foot slips from under him mid-march - and he lands on the floor on his bum.

Anthony, a radiographer, from Liverpool, said: "I was just filming randomly, and he just slipped right over."

"I had to watch the video back to believe it."

"People watching were shocked - everyone was saying 'did that just happen?'."

"The guard jumped back up quickly and recomposed himself, then he was straight back into action."