Footage has emerged of one of the Queen’s guards shoving a tourist outside Windsor Castle.

The woman had blocked the path of the marching soldier to stand on the wrong side of a rope barrier, apparently posing for a photograph.

Dressed in yellow, she is directly in the path of the guard, who shoves her almost to the ground from behind. The woman screams and looks shocked, while the red-clad guard continues his drill.

It is not known when the incident occurred.

The usually unflappable Queen’s Guards are the official protectors of Britain’s royal residences. They wear traditional red and black uniforms with bearskin hats, and draw thousands of tourists every year.

The Guards consist of five infantry regiments – the Grenadier, Coldstream, Scots, Irish and Welsh Guards – and two regiments of the Household Cavalry – the Life Guards and Blues and Royals.

The soldiers are poised and silent, although they do occasionally break rank to advise tourists to keep their distance.

Guidelines for dealing with trouble-making tourists suggest warnings start with the soldiers stamping their feet and shouting, The Sun newspaper reported.

They are allowed to raise their rifle as a final warning. If that doesn’t work, trouble-makers can be detained.

Last year a guard at Windsor Castle was filmed screaming at a man who got too close while attempting to capture the perfect camera shot.

As the man prepared to pose for a picture with the parading soldiers, one guard bellowed “stay away” in front of a stunned group of onlookers.

Footage from that incident shows the tourist turning around and beginning a salute to the soldier.

“The Household Division is proud to guard Her Majesty and honoured that people come from around the world to watch our ceremonial spectacle,” a spokesman for Britain’s Ministry of Defence told The Sun.

“The ropes are there to protect both the public and our soldiers; please stay behind them.”