Children as young as eight have been referred for specialist drug and alcohol treatment in Waltham Forest.
Charities are calling for improved drugs education in schools following an investigation by the Press Association that revealed the details.
Treatment experts said the most common reason for children to come into contact with drugs and alcohol is through their parents and preventative work is key to heading off misuse among youngsters.
Waltham Forest has brought a successful prosecution against two men for spitting in the street, the first of any council in Britain. The Evening Standard reports that Khasheem Kiah Thomas and Zilvinus Vitkas were fined £80 under anti-litter laws.
Two years ago, Waltham Forest launched a new campaign to tackle gang culture. They called it "Enough is Enough" - and introduced a host of positive activites for young people.
And it's been a real success. Today the Mayor joined local MP Iain Duncan Smith to find out how they're keeping local young people engaged -- and active.
London Mayor Boris Johnson and Iain Duncan Smith, MP for Chingford and Woodford Green, paid a visit to a scheme called Enough is Enough in Waltham Forest. It was set up two years ago to tackle the local gang culture by keeping young people active.
Chris Robbins, the leader of Waltham Forest Council, and Mr Duncan Smith explained how the scheme had worked.
The London Mayor Boris Johnson and the Chingford and Woodford Green MP Iain Duncan Smith put their bodies on the line when they paid a visit to a scheme to help young people in Waltham Forest. Two freerunners used them as a hurdle to show off their skills.
Met Police have issued an appeal to help them trace the whereabouts of a 15-year-old girl who has not been seen since Monday.
Officers are becoming increasingly concerned about Chloe Church who was last seen in the Waltham Forest area.
Police are asking for help in finding a 44-year-old man, who's wanted on recall to prison.
Claudius Francis was released after serving a sentence for burglary. But, he's since broken his curfew conditions, and has not been seen since.
Officers would also like to speak to Claudius Francis in connection with a burglary.
He has links to Waltham Forest, Haringey and Hackney.Anyone with any information is asked to contact Waltham Forest Police on 101. If you wish to remain anonymous, then please call Crimestoppers on 0800 555 111.