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  A millionaire fitness firm founder was killed attempting a British land speed record. Zef Eisenberg, who launched Maximuscle, died at Elvington Airfield, near York, where in 2006  ex-Top Gear presenter Richard Hammond crashed . Motorsport UK said the 47-year-old's car "went out of control at high speed at the end of a run" on Thursday. Guernsey-based Mr Eisenberg  was involved in a "near-death" 230mph crash at the same airfield in 2016 . Motorsport UK said Mr Eisenberg was attempting to break the British land speed record in a Porsche 911 Turbo S when he was  killed at about 16:30 BST . The organisation paid tribute to the "much-loved member of the motorsport community" and confirmed a full investigation into the crash had begun. The millionaire who pushed the boundaries of speed Mr Eisenberg left behind his partner Mirella D'Antonio and two children, it added. Sports nutrition firm Maximuscle said it was "devastated" at the news of the

  US President Donald Trump has said he and First Lady Melania Trump have tested positive for coronavirus and are now self-isolating. Mr Trump, aged 74 and therefore in a high-risk group, wrote on Twitter: "We will get through this together." The president has "mild symptoms" of coronavirus, White House officials say. Mr Trump's announcement comes just over a month before the presidential elections on 3 November, where he faces Democratic challenger Joe Biden. The development comes after Hope Hicks, one of Mr Trump's closest aides, tested positive. Latest updates Covid: What is the risk to Donald Trump's health? Skip Twitter post by @realDonaldTrump Report End of Twitter post by @realDonaldTrump In a tweet,  Mr Biden and his wife Jill wished the first couple a swift recovery : "We will continue to pray for the health and safety of the president and his family," he said. It is not clear whether Mr Biden is also being tested, and whether he will