Schoolchildren as young as eleven have been caught with drugs on school premises in parts of West Yorkshire, new figures reveal.
Data from police forces in England and Wales shows Class A drugs such as heroin and crack cocaine are among the illegal substances seized in more than 2,000 incidents and offences across the country over the last four years.
Teachers described the figures as a “worry”, and “the tip of the iceberg of what young people are encountering on the streets”.
In West Yorkshire, 52 people had drugs confiscated while on school premises between April 2011 and December 2014.
The youngest person to be caught with drugs on school premises was an 11-year-old schoolboy who had cannabis seized from him in 2011/12. A 12-year-old schoolboy also had the class B drug seized while on school land in 2014/15.
Of the 52 incidents, cannabis was seized on 48 occasions, cocaine twice, and LSD and central nervous system depressants both once.
Nationally the youngest person caught with drugs was eight years old. The data, from 34 police forces dating back to 2011, was obtained by the Press Association under the Freedom of Information Act.
Cannabis, the most widely used illegal drug in the UK, was involved in more incidents and offences than any other, 625, while cocaine was present in 27 cases.
Chris Keates, general secretary of the NASUWT teaching union, said: “Any incident of drugs on school premises is worrying as it will often only be the tip of the iceberg of what young people are encountering on the streets.
“Teachers and school leaders are always alert to the potential for young people being involved in drug or alcohol abuse.”