This is the moment a commuter pushes a fellow Tube traveller who asked him to move to the right side of the escalator so he could walk down it.

A grey-haired man can be seen in the video trying to walk down the escalator as the young male stops on the left side – which is reserved for passengers who want to walk.

He appears to ask him to walk or move to the right side, but the younger man refuses and as they both get off the escalator he shoves the older passenger, who falls head-first on to the floor.

The incident – which was filmed by a woman standing behind them on the escalator – is said to have taken place recently at Euston Station in London.

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According to escalator etiquette on the London Underground, the right side of the escalator is for standing while the left side is intended for those who wish to walk.

In the footage, the traveller appears to tell the younger man off for standing in the ‘walking path’ just steps before they reach the bottom.

The grey-haired passenger tries to walk down the left side but a younger man stands still just seconds before the end of the escalator (Picture: News Dog Media)

The two appear to have a heated exchange (Picture: News Dog Media)

The pair look like they’re having a tense exchange before the commuter shoves the older passenger.

Fellow passengers fail to intervene as the man gets back up.

He appears in agony as she touches his thighs.

The woman filming can be heard singing: ‘This guy just pushed him. He just pushed him.’

The man who was standing still then pushes the man who attempted to walk (Picture: News Dog Media)

He falls to the ground (Picture: News Dog Media)

Many defended the older man on social media.

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One man only named as Andrew said: ‘Feel sorry for the old man. I have to remind people everyday that you walk on the left and stand on the right.’

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Matthew Adams wrote: ‘I hate them people who don’t know that u meant to stand on the right n the left for if u in a rush. I’ve had to shove couple man at the airport still ain’t gonna lie.’

Meanwhile, Jameel Soudi said: ‘Why does the underground make people so unruly?!’