A promising schoolboy athlete from Notting Hill died after taking ecstasy at an illegal rave, a coroner ruled.

Shot put champion Rio Andrew, 15, suffered multiple organ failure and died at Great Ormand Street Hospital, two days after collapsing at the unlicensed music event in Croydon.

The inquest also heard how paramedics trying to save his life were pelted with objects thrown from the building by revellers.

A police investigation had been launched but has now been suspended, with officers saying there is no criminal case to answer to.

The teenager’s death caused an out-pouring of grief , with tributes paid to the Year 10 pupil by friends from Holland Park School where he attended, alongside his coach.

Rio was the U15 English schools national champion shot putter, ranked second in the UK for his age in 2013 and was a star member of the Thames Valley Harriers based at the Linford Christie Stadium in Wormwood Scrubs .

He had been one of thousands attending the unauthorised gathering at a disused post office sorting office on June 14 2014.

Shot put champion Rio Andrew, who died after attending an illegal rave in Croydon

Croydon Coroner’s Court was told the teenager collapsed and started frothing at the mouth after taking what he thought to be ketamine - also an illegal drug. But he had injested a fatal dose of MDMA .

At the hearing on Wednesday (January 6), the court heard how privately hired medics were forced to treat Rio before carrying him outside, with London Ambulance Service (LAS) treating party-goers in a nearby office building to avoid the missiles being thrown.

Ian Jones, of the LAS’s Hazardous Area Response Team who was on duty and said: “Initially our response was to attend to people who were injured by objects thrown from the building.

“People managed to get on the roof of the Post Office and starting throwing metal objects at us.

“We moved our LAS checking area into the lobby of the office building.

“He was lying on his back and frothing at the mouth. He was unresponsive.

“He was deeply unconscious and frothing very much at the mouth.

“A young lad had informed us that the young lad in question had taken three doses of ketamine over a period of time.”

A post-mortem on June 18 found Rio’s cause of death to be multiple organ failure due to MDMA intoxication.

Following the rave police had asked for information . However, in a statement given after this week’s inquest they said there was no criminal case to answer to.

Commander Simon Letchford said: “Our thoughts are with Rio’s family during this very difficult time. Rio was a young man devoted to playing sport and was well-liked and thought of amongst his friends, which has made his death all the more tragic.”

He added police “will do all we can to prevent unlicensed events and illegal raves like these from taking place in London”.