A Buckingham Palace guard has been spotted losing his footing while on duty.

The King’s Guardsman was caught on camera slipping and landing on his backside outside the royal residence on Sunday. He then rose to his feet and carried on with his duties.

Anthony Smith, 45, was visiting Buckingham Palace during a weekend in London and happened to be filming when the guard took a tumble.

Mr Smith, a radiographer from Liverpool, said: “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.”