A HUGE brawl marred racing at Royal Ascot — leaving one man KO’d on the floor as The Queen cheered on her horses nearby.

Shocking video footage captured a group of boozy men trading blows at the posh racecourse.

Shocking footage shows boozy men in a terrifying punch-up at Royal Ascot

One racegoer was KO'd during the huge brawl at the posh racecourse

Chairs, tables and drinks went flying in the terrifying punch-up as bloodied racegoers pounded each other.

Horrified onlookers ran for cover as the violence spilled into a seated bar area.

One man in a three-piece suit was left sprawled face down and motionless on the turf.

As security helped the bloodied man to his feet, one woman is heard screaming: “He’s got a bottle!” Another man then runs towards him.

The carnage took place in Ascot’s Windsor Enclosure – the economy section of the Berkshire racecourse — on Friday. Her Majesty was cheering on her two runners.

One witness said: “There is always fisticuffs at big events like this when the drink is flowing but this one looked really nasty.”

No arrests were made but cops later made three arrests as two groups exchanged blows.

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Two men — one 59 of Epsom, Surrey, the other 26 of Chelmsford, Essex — and a woman, 26, also from Chelmsford, were arrested for affray.

There were similar brawls at the track last year.

A racecourse spokesman said: “We stepped up security considerably since last year.”

Two men grapple with each other in the video as racegoers watch on

A man throws a punch at another in the chaotic scenes at Royal Ascot

The huge brawl happened as The Queen attended Royal Ascot to cheer on her two runners Credit: Rex Features

The Queen stuns in a pink outfit as she arrives at sunny Royal Ascot to cheer on her horses