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Vapes confiscated from school pupils contain high levels of lead, nickel and chromium, BBC News has found.

Used vapes gathered at Baxter College in Kidderminster were tested in a laboratory.

The results showed children using them could be inhaling more than twice the daily safe amount of lead, and nine times the safe amount of nickel.

Some vapes also contained harmful chemicals like those in cigarette smoke.

High levels of lead exposure in children can affect the central nervous system and brain development, according to the World Health Organization.

It is thought vapes are being used widely by secondary school children and Baxter College is not alone in trying to stop them vaping during school hours.

The Inter Scientific laboratory, in NAME_1, which works with vape manufacturers to ensure regulatory standards are met, analysed 18 vapes.

Most were illegal and had not gone through any kind of testing before being sold in the UK.

Lab co-founder NAME_2 said: "In 15 years of testing, I have never seen lead in a device.

"None of these should be on the market - they break all the rules on permitted levels of metal.

"They are the worst set of results I've ever seen."