Far-right group the English Defence League was involved in fights with a group of Muslims outside West London Magistrates Court in Hammersmith on Wednesday afternoon, prompting police to make eight arrests.
Two women were taken to hospital after the clashes, which involved up to 150 members of the EDL and a group of teenagers.
The EDL had descended on the area to show support for founder Stephen Lennon - also known by the pseudonym Tommy Robinson - who was in court charged with a public order offence during Armistice Day in Kensington last year, when Muslim extremists burned poppies.
A video seen by the Chronicle shows the EDL crowd chanting songs about the Taliban and 'Muslim bombers', as a group of youths of Asian appearance loiters in the background.
The situation escalates when two of the youths infiltrate the crowd and throw punches at a woman and a man.
There are then further scuffles with police as officers battle to retain order. A number of people are seen surging towards the court entrance causing the court to be locked-down and suspended.
A helicopter and riot officers had to be dispatched to bring the situation under control, while there were also reports of disorder in Margavine Cemetery in Barons Court.
Police confirmed they are investigating two allegations of assault. Of the eight arrests, two were for affray and actual bodily harm, one was for violent disorder and five were for affray. One of those arrested has links to the EDL.
An email to the Chronicle from a woman claiming to be Lennon's PA accused officers escalating the tension by allowing the youths to loiter.
But a Met spokeswoman said the counter demonstrations had been 'spontaneous' and involved youths who had had court appearances themselves.
"There was an appropriate plan in place, we were aware EDL supporters would be at the court. There was no planned counter demonstrations, this was a spontaneous incident that appears to involve a number of people that had been attending the court."
The EDL opposes what it sees as the spread of Sharia Law and Islam extremism in England.
It has been banned from marching in the past due to its threat to public safety and is being investigated by police.
Commentators have described the group as being "a dangerous cocktail of football hooligans, far-right activists and pub racists".
The EDL insists it is not racist.
Lennon was later fined by magistrates for a public order offence and said he would appeal.
Were you in the area at the time of the fights? Did you see what happened? Contact me at firstname.lastname@example.org