The Metropolitan Police has launched an investigating after a William Perkin CofE High School boy died following an allergic reaction

The force arrested a pupil on Wednesday June 28 after the London Ambulance Service was called to the Greenford school at around 11.30am to a report of a pupil taken unwell.

The 13-year-old boy who suffered an allergic reaction was taken to hospital where he remained until he died on Sunday, July 9.

In a statement, the Met Police said: "Police were subsequently called when it became apparent that an incident had occurred which led to the boy coming into contact with the allergen.

"Those events remain under investigation.

"The boy remained in hospital but on Sunday, July 9 he subsequently died - his parents were with him.

"A post-mortem examination is scheduled to take place on Wednesday, July 12.

"A 13-year-old boy, a pupil at the same school, was arrested on Wednesday, 28 June and interviewed in connection with the incident. He has been bailed to return on a date in late July pending further enquiries."

Anyone with information that could assist the investigation is asked to contact police on 020 8785 8244 or contact Crimestoppers anonymously on 0800 555 111.

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