Leah Heyes, who had her “whole life ahead of her”, tragically died after consuming the Class A drug in Northallerton, North Yorkshire

Two teenagers who supplied a 15-year-old schoolgirl with a fatal dose of MDMA for just £10 have been jailed after one of them warned “yous are going to end up f***ed up on this.”

Mitchell Southern, 19, and Connor Kirkwood, 18, sold Leah Heyes the Class A substance on May 11 last year in Northallerton, North Yorkshire.

Leah, who had her “whole life ahead of her”, consumed two ‘bombs’ in a car park before becoming “unpredictable” and “volatile”, a court heard.

She was rushed to hospital but tragically died that evening after going into cardiac arrest.

Leah’s mother paid a heartbreaking tribute to her daughter whose death left a “huge hole” in their lives which will “never be filled”.

She warned others to realise the “deadly consequences” of taking drugs.

Teeside Crown Court heard Southern was friends with Leah and sourced the drugs from Kirkwood, a dealer, on her behalf.