Sean Edwards died in crash 'after throttle got jammed' Daphne McKinley pleaded with him not to go to Australia to take lesson Played his father in Rush, who famously pulled Nikki Lauda from the wreckage of his burning Ferrari at the Nurburgring in 1976 By Jill Reilly and Simon Tomlinson 'Mother's worst nightmare': Daphne McKinley, whose racing driver son Sean Edwards died in a crash on the final corner of a test session in Australia The British racing driver son of Formula 1 star Guy Edwards died in a crash on the final corner while giving a lesson on a track, his mother revealed today. Daphne McKinley believes the car her son Sean Edwards was travelling in careered off the track because the throttle became jammed. She also told how she begged him not to travel to Australia for the lesson. Mr Edwards was a passenger in a Porsche when it hit a wall at Queensland Raceway in Willowbank, west of Brisbane, yesterday morning. The 26-year-old starred in Rush as his father, Guy Edwards, who famously pulled Niki Lauda from the wreckage of his burning Ferrari following the Austrian's crash at the Nurburgring in 1976. Ms McKinley told The Evening Standard: 'It was just such a shock to have it happen in that way. I believe it was the last corner of the track and the session. I said to him just a few days before "why are you going to Australia to do a lesson? You are winning the championship. You don't need to go. 'It's a mother's worst nightmare. It's what you never want to happen, for your children to die before you. The loss to us is unfathomable. The car shot across up to 100m of gravel, ploughed through two layers of tyres and hit a concrete wall before bursting into flames. The driver of the Porsche, a 20-year-old man from Brisbane, was pulled from the burning wreckage and is in intensive care with life-threatening injuries. In love: Mr Edwards with his girlfriend Laura Mitendorfer, whose Twitter posting suggested they may have been getting engaged Lifelong passion: Mr Edwards started racing at a go-kart track in Battersea from the age of three Rising star: Mr Edwards racing at Silverstone at the age of 17 Ms McKinley, who owns a property developers in Knightsbridge, said witnesses had seen the brake lights working, which has led her to believe it was the throttle that became stuck. There were no passenger controls on the vehicle. Mr Edwards began learning his trade at the age of three at an indoor go-karting track in Battersea. He later threw all his energy into the sport after finding it hard to study due to his dyslexia and an attention deficit disorder. Sean Edwards died instantly in a crash during a private test this morning. He played his father, F1 driver Guy Edwards in Rush, and is pictured wearing his father's suit and helmet and next to his original car Sean Edwards starred in Rush as his father Guy Edwards (left) who famously pulled Nikki Lauda out of the burning wreckage of his Ferrari in 1976 at the Nurburgring He is currently leading this year's Porsche Supercup standings, a series which supports Formula One at a number of grands prix, with a double header looming in Abu Dhabi next month to conclude the campaign. His Twitter page suggests he became engaged in the summer - Laura posted a photo of a diamond ring on the social networking site next to the words: 'Thank you #diamonds #areagirls #bestfriend.' Only a few days ago, she tweeted Mr Edwards asking if he missed being at home. Yesterday, Inspector Dave Preston, from Queensland Police, said it had been a difficult operation to get Mr Edwards and the driver out of the smashed up super-car.