A teenager from Harpenden was killed in a "freak accident" after he crashed a jet ski into his twin brother, an inquest was told.

Simon Satchwell was riding the ski in Abu Dhabi during a Christmas holiday with his twin brother Lucas and father Christopher.

The trio had been riding near Al Lulu island for around half an hour on New Year’s Eve on the last day of their two week holiday, when Mr Satchwell and Lucas stopped for a drink near to the coast.

Hertfordshire Coroners Court heard 14-year-old Simon carried on by himself riding in circles to create small waves to jump over, around 300 yards away.

Giving evidence at the inquest yesterday, Mr Satchwell said he saw his son turn to head towards them but lost sight of him as he passed behind Lucas' stationary jet ski.

Moments later, Simon, a talented science student at Sir John Lawes School, crashed into his twin at high speed.

The impact threw both twins from their skis and into the water. Simon was taken ashore by his father, who tried to resuscitate him as Lucas called the local coastguard.

When interviewed at the Sheikh Khalifa Hospital hours after the death of his twin, Lucas said: "While I was talking with my father I felt a strong blow against my jet ski and fell in the water.

"I saw my brother come off his jet ski. My father took him toward the coast and we tried to give him first aid but to no avail."

Coroner Edward Thomas heard that the family had also hired two jet skis on Boxing Day, five days before the accident.

He rode one with a son as a passenger, allowing the other son to ride the second jet ski alone for the first time.

Mr Satchwell said they had also previously ridden with him on jet skis during holidays in 2012 and 2013 to Tunisia and Lanzarote, and they "fully understood" how to ride them responsibly. He said he believed Simon may have been unconscious when the crash occurred.

The court heard an emergency stop lanyard, attached to Simon's wrist as a safety precaution, had not been pulled before the crash.

A public prosecutor in Abu Dhabi launched an investigation and spoke to Lucas, Mr Satchwell and emergency services before closing the investigation. He did not order a technical examination of the jet ski.

Mr Thomas told the court he would be writing to the Foreign and Commonwealth Office to highlight differences in legislation governing jet ski hire in foreign countries.

Recording a narrative verdict, Mr Thomas said Simon had died from multiple traumatic injuries sustained while he was on his own on the jet ski. He said: "I can't imagine how awful this has been for all three of you, in particular Lucas."

Following his death, Simon's friends posted tributes on Facebook and Twitter, while his school named an annual science lecture in his memory.