This is the moment a member of the Royal Queen's Guard shoved an Asian tourist outside Windsor Castle.

The woman was standing on the wrong side of the roped-off area as the guardsman marched towards her.

She appeared to be posing for a photo when the Queen's Guard barged into her, propelling her forwards.

The woman let out a scream, but the soldier continued on without a reaction.

While the Queen's Guard are well known for their red coats and bearskin hats, they are charged with protecting official royal residences.

The incident has caused a flurry of conversation, with many speculating on who they think was in the wrong, as well as the tourist's ethnicity.

The earliest version of the video was found on Chinese social media platform Weibo but was believed to have initially been shared on a closed network like WeChat or WhatsApp.

As a part of the post, the hashtag #越界拍照被皇家侍卫推开, which can be roughly translated as "overstep the boundary, take a photo, get pushed by the Royal Guard", received thousands of posts.

Tim Hague, a BBC presenter, posted to Weibo saying the Royal Guard's responsibility was to protect the safety of the Royal family.

"The cordon is there to signify that you should not overstep it, and if you do, then the Royal Guardsmen have the right to determine that you are a danger to the place that they are guarding," he continued.

"They are permitted to use guns in such a situation. Pushing would be considered the most lenient way of settling such a matter."

According to the Telegraph, The UK Ministry of Defence said: "The Household Division is proud to guard Her Majesty and honoured that people come from around the world to watch our ceremonial spectacle. The ropes are there to protect both the public and our soldiers; please stay behind them."

It's currently unclear when the video was filmed.