Children as young as four years old are among hundreds of young people being sent to specialist drug and alcohol treatment centres.
An investigation by the Press Association found that councils across the UK were referring youngsters to the centres.
Experts said the most common reason children had access to drugs was through their parents.
More top news
The Bank of England warns lenders they must set aside cash for when the next crisis hits - but it could lead to rising rates for borrowers.
A Russian army deserter was detained by police after he was found in a makeshift shelter in a forest where he had been hiding for 11 years.
MPs are gearing up for the vote on whether Britain should join airstrikes in Syria -but what weapons are at the UK's disposal?