More than 12,000 people attended Harrow Council's anti-violence Gig in the Park event.
The show used music to help young people communicate anti-violence messages to each other and was organised by five teenagers from Pinner, north London. The theme of the festival was "Love Music, Hate Violence" and it formed part of the council's Under One Sky festival. Gig in the Park was part-funded by the Youth Justice Board.