A boy with a severe dairy allergy died after he was chased by a schoolmate who threw cheese down his t-shirt, an inquest heard.

Karanbir Cheema, known as Karan, suffered a serious allergic reaction in Greenford, West London, just before midday on June 28 last year.

The 13-year-old was severely allergic to wheat, gluten, all dairy products, eggs and all nuts, was asthmatic and suffered from atopic eczema.

He went into anaphylactic shock at William Perkin Church of England High School in Greenford, west London, St Pancras Coroners' Court heard.

Another boy, also 13 at the time, was later arrested on suspicion of attempted murder but has not been charged.

On Wednesday, the inquest heard from paramedic Kierin Oppatt, who said the 999 operator was told it was "just an allergic reaction" but when he arrived Karan was "gasping for air" and had broken out in hives.

The boy was unconscious and stopped breathing shortly after the Mr Oppatt and his colleague arrived.

Senior coroner Mary Hassell asked the witness, one of the first paramedics on the scene, to go through the tragic events.

Mr Oppatt said: "The call came in at 11.40am. We arrived on the scene at 11.47am. The call came in as just an allergic reaction.