More than 100,000 protesters marched through central London on Saturday, carrying flags of England and Britain and scuffling with police in one of the UK’s biggest right-wing demonstrations of modern times.

Axar.az reports, citing Reuters, London’s Metropolitan Police said the “Unite the Kingdom” march, organized by anti-immigrant activist Tommy Robinson, was attended by around 110,000 people, who were kept apart from a “Stand Up to Racism” counter-protest attended by around 5,000.

The police appeared to be taken by surprise by the size of the turnout, describing the rally as “too big to fit into Whitehall,” a wide street lined with government buildings, on the approved route of the march.

Police trying to prevent protesters veering from the route faced “unacceptable violence,” the force said, describing officers being kicked and punched and facing hurled bottles, flares and other projectiles.

The police said 26 officers were injured, including four seriously.

Arrests totaled 25, which the force said was “just the start.”

“We are identifying those who were involved in the disorder and they can expect to face robust police action in the coming days and weeks,” Assistant Commissioner Matt Twist said.

The march brought a culmination to a highly charged summer in Britain that included protests staged outside hotels housing migrants.

Demonstrators carried the Union flag of Britain and the red and white St George’s Cross of England, while others brought American and Israeli flags and wore the “Make America Great Again” or MAGA hats of US President Donald Trump. They chanted slogans critical of Prime Minister Keir Starmer and carried placards including some saying “send them home.” Some attendees brought children.