Metropolitan Police said there were “significant disruptions” at two unlicensed music events on Saturday night – a rave in Tooting, and the unofficial Pride event in Clapham.
Dispersal zones were created on areas of Clapham Common and Tooting Bec Common as people crammed in and refused to adhere to social distancing measures.
Ravers have continued to hold illegal gatherings for the fourth night in a row as specially-trained officers took to the streets of London overnight to disperse crowds of revellers
Met Police Events tweeted: “Officers are at the scene of two large unlicensed music events in Clapham Common & Tooting Bec Common.
Police swarmed the streets to disperse two illegal raves in south London last night as revellers across the capital partied for four nights in a row.
Dispersal zones allow uniformed officers extra powers to order people to leave the area and not return.
“Officers will remain at both scenes until the events are cleared.”
“We understand the impact these are having on the local community.
“They are dispersing those in attendance.
A total of seven people were arrested and two weapons seized by police at illegal gatherings over Friday night and Saturday morning.
The events follow a spate of unlawful gatherings in London over the past four nights.
A third illegal rave was also reportedly held in Springfield Park in Hackney.
The arrests include two people in Newham who were carrying a firearm and a “Rambo-style” knife respectively, the Met said.
A further five people were arrested at another music event in Third Avenue, West Kilburn, including two for attacking police officers. The Met said two officers were injured but did not require hospital treatment.
Officers were called to Newham at 4.50pm on Friday after receiving reports from concerned residents about a sound system being set up in Hoskins Close by a large group of people.
It comes after Met Police Commissioner Dame Cressida Dick vowed to shut down events flouting health regulations.
Another three people were arrested in Third Avenue on suspicion of violent disorder, a breach of Covid health regulations and racially aggravated public disorder offences targeting officers.