Four teenagers have been arrested after the fight, involving a dozen young people dressed in black, erupted shortly before 4pm on Friday on Bullsmoor Lane, in front of a footpath between a Burger King and a McDonalds fast-food restaurant.
Two of the individuals appeared to launch at each other with large knives, footage posted to X, formerly Twitter, showed, while others watched on.
The Metropolitan Police said it was reported that two people were seen to be in possession of knives. One teenager was taken to hosoital with a stab injury.
Officers attended the scene and four teenagers were arrested on suspicion of possession of an offensive weapon and grievous bodily harm.
Two teenagers have been charged and remanded in custody. Two others were released on police bail. Enquiries are ongoing.
Knife crime in London surged by 16 per cent in just one year, the Standard reported in July.
The Office for National Statistics said that 12,786 knife offences were carried out in the capital over the 12 months to the end of March this year. The total compares with a figure of 11,031 for the comparable period a year earlier and represents an increase of 16 per cent.
The main reason for the rise was a surge in knife-point robberies which were up by nearly a third.
In his latest attempt to reassure Londoners, Mayor Sadiq Khan announced that all secondary schools would be offered the chance to be offered knife wand metal detectors in the wake of the killing of 15-year-old Elianne Andam in Croydon.
She was fatally stabbed as she made her way to school near the borough’s Whitgift shopping centre. A 17-old boy has been charged with her murder.
