A Metropolitan Police spokesman said officers were called to the site at 18:21 on Friday following reports of disorder.
“An event was taking place to mark the death of the president of Iran, attended by supporters of the Iranian government. Anti-government protesters had gathered outside the venue and clashes had broken out between the groups,” the force said.
Four people were injured and were treated by paramedics, while one man was arrested on suspicion of violent disorder and a dispersal order was implemented.
Ms Borham, who founded the activist group Stage of Freedom after Amini’s death, said she was then followed to the hospital by two cars from the pro-Iranian group. “They were waiting for us outside the hospital,” she said, adding that the cars only left when the police arrived an hour later.
She has urged the UK Government to designate the IRGC as a terrorist organisation.
“We only have one request, for the UK government to pay attention and designate the IRGC as a terrorist organisation – not just for the safety of the people in Iran, but for the safety of the British people,” she said.
London is home to a large Iranian community, most of whom left in the years since the country’s Islamic revolution in 1979.
The police said they would examine footage shared on social media and called on anyone with other footage or information to get in contact.