The ‘out of control’ driver who smashed his Audi into an Uber car, causing a triple fatality in Sydney‘s southern suburbs on Saturday, has been revealed as a personal trainer and gym manager.

Tamati Gilbert, 43, flipped his Audi on Rocky Point Road in Sans Souci after fleeing a personal welfare check at his home and driving at a ‘considerable speed’, launching over a concrete barrier and crashing into a blue Toyota Camry.

Uber driver Shoaib Hussain, 22, was behind the wheel of the Camry and was doing his final job of the night, taking 28-year-old Seamus Duignan home after a concert for his birthday.

Mr Duignan, Mr Hussain and Gilbert all died at the scene.

Gilbert, a fitness industry veteran, had left his home abruptly after his partner called police, raising ‘grave concerns’ about his mental health.

Police attended the home in Gymea Bay at about 12.25am to conduct a welfare check and found Gilbert sitting in his Audi in the driveway.

He sped off before officers could speak to him and, ten minutes later, police received reports that an Audi had flipped over a concrete barrier 13km away in Sans Souci and landed on a blue Toyota Camry.

CCTV showed the Audi travelling at high speed moments before the crash. Separate footage captured the fiery moment of impact.

Tamati Gilbert, pictured above with his sister Renata, who says her family is devastated by his death, drove his Audi at high speed before the fiery crash that resulted in his death and the deaths of Uber driver Shoaib Hussain, 22, and 28-year-old Seamus Duignan
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Tamati Gilbert, pictured above with his sister Renata, who says her family is devastated by his death, drove his Audi at high speed before the fiery crash that resulted in his death and the deaths of Uber driver Shoaib Hussain, 22, and 28-year-old Seamus Duignan

Shoaib Hussain, 22, was described by his friend as 'kind, nice and hard-working' and that he had taken up Uber driving to send money home to his family in Pakistan, who are 'completely broken' by their son's tragic death
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Shoaib Hussain, 22, was described by his friend as ‘kind, nice and hard-working’ and that he had taken up Uber driving to send money home to his family in Pakistan, who are ‘completely broken’ by their son’s tragic death

Tamati Gilbert, 43, flipped his Audi on Rocky Point Road in Sans Souci after driving at 'considerable speed' and crashing into a blue Toyota Camry killing the two men inside it
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Tamati Gilbert, 43, flipped his Audi on Rocky Point Road in Sans Souci after driving at ‘considerable speed’ and crashing into a blue Toyota Camry killing the two men inside it

Shocked bystanders tried to help after the impact caused one of the cars to catch alight, with one woman saying she ‘grabbed the fire extinguisher, gave it to somebody and just checked that people weren’t trapped inside’.

The Uber driver was a social work student from Pakistan who had started driving on weekends to support himself and send money back to his family, who the Daily Mail has learned are ‘completely broken’ by news of his death.

His friend Qasim Malik said Shoaib was ‘hard-working, kind and nice’.

Sean Duignan described his brother Seamus as ‘a good man, brother and uncle’ who was ‘never in trouble, just a good man who loved a laugh’.

Tamati Gilbert’s sister Renata posted on Facebook that her family was ‘absolutely devastated, heartbroken and rocked by his early passing’.

On his LinkedIn page, Gilbert said he had been ‘in the fitness industry for a long time and lost a lot of weight doing so’ and that he had several certificates as a fitness coach.

Seamus Duignan’s mother, Kim Duignan, has demanded a comprehensive investigation into the crash that claimed her son’s life.

‘There needs to be a complete inquest into what caused this crash,’ she said.

Seamus Duignan (above) was taking an Uber home when he and the driver, Shoaib Hussain, died after fitness trainer Tamati Gilbert smashed his Audi into Shoaib's Camry
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Seamus Duignan (above) was taking an Uber home when he and the driver, Shoaib Hussain, died after fitness trainer Tamati Gilbert smashed his Audi into Shoaib’s Camry

Shocked bystanders tried to help after the impact caused one of the cars to catch alight, with one woman saying she 'grabbed the fire extinguisher, gave it to somebody and just checked that people weren't trapped inside'
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Shocked bystanders tried to help after the impact caused one of the cars to catch alight, with one woman saying she ‘grabbed the fire extinguisher, gave it to somebody and just checked that people weren’t trapped inside’

Tamati Gilbert has been in 'the fitness industry for a long time and lost a lot of weight doing so' and that he has several certificates as a fitness coach
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Tamati Gilbert has been in ‘the fitness industry for a long time and lost a lot of weight doing so’ and that he has several certificates as a fitness coach

Mr Malik said that Shoaib’s family wanted his body sent back to Pakistan when forensic examinations had been completed so that they could bury him at home.

‘He was a kind and nice person, and he was still only young,’ Mr Malik said.

‘He came here when he was 18. It is a very big loss for his friends and family.’

Mr Malik had been speaking with Mr Hussain immediately before the crash when Shoaib was about to pick up Mr Duignan and take him home as the last job of the night.