London witnessed one of its largest far-right demonstrations in recent memory on Saturday, as a march led by activist Tommy Robinson spiraled into violence, leaving at least 26 police officers injured and resulting in 25 arrests.

According to the Metropolitan Police, clashes erupted when sections of Robinson’s supporters attempted to push through barriers separating them from a counter-protest organized by the group Stand Up to Racism. Officers were reportedly punched, kicked, and struck with bottles before riot police were dispatched to regain control.

Authorities confirmed that four officers sustained serious injuries, including broken teeth, a concussion, a suspected broken nose, and a spinal injury. Reinforcements carrying riot shields and helmets were rushed to the scene to contain escalating tensions.

Crowd estimates placed attendance at between 110,000 and 150,000, making it one of the biggest far-right gatherings in the UK in recent years. Organizers, however, claimed turnout was even higher, branding it the “Unite the Kingdom” march. Robinson hailed the event as a “tidal wave of patriotism” and described it as the beginning of a “cultural revolution.”

Robinson, born Stephen Yaxley-Lennon, is the founder of the nationalist and anti-Islam English Defence League. He has long been a controversial figure in British politics and remains one of the most prominent voices on the UK’s far-right.

The rally drew prominent figures from across Europe’s far-right networks and even saw a surprise video address from billionaire Elon Musk. In his message, Musk criticized Britain’s political leadership, argued that citizens were “scared to exercise their free speech,” and urged a push for political change.

Police said more than 1,600 officers were deployed across London to manage the rally, which coincided with several other major public events including football matches and concerts. Authorities confirmed that investigations into the violence were underway and that additional arrests were likely.