A 17-year-old man was arrested on suspicion of threatening to kill a police officer after they were called to an illegal rave taking place in a disused building at a primary school.
Hundreds of people attended the all-night unlicensed party at Aylward Primary School, in Pangbourne Drive, Stanmore, on Saturday, May 6.
Met Police Officers attended the scene at around 10.26pm after reports of loud music playing from inside the building.
They found a large number of people already inside the venue, as well as others attempting to gain entry.
However, a decision was made for the police not to enter the premises in order to prevent “serious disorder and disruption on the streets surrounding the location.”
A spokesperson for the Met Police, who was not named, said: “Throughout the time that officers were at the school, their main priority was to ensure the safety of those both inside and outside the venue, while working to bring the event to a timely conclusion.
“A decision was made not to enter the unlicensed music event to prevent serious disorder and disruption on the streets surrounding the location.”
Ravers danced for more than 12 hours and the event eventually drew to a close at 5:45am on Sunday, 7 May.
Footage believed to be taken at the event showed people dancing to music as florescent lights flashed.
All those in attendance left the venue and there were no reports of any incidents of disorder.
However, a 17-year-old man was arrested on suspicion of making threats to kill a police officer.
He was taken to a north London police station for questioning and he has been released under investigation pending further enquiries.
It is also believed the disused building is set to be demolished later this year and the school will move to another site.
The head teacher at Aylward Primary School has been contacted for comment.