Not many personal trainers get to accompany their boss in first-class luxury when they cross the Atlantic. But then not many fit young men work for Heather Mills. Ben Amigoni, 24, has hardly left Heather's side since she launched her bitter battle for a slice of Sir Paul McCartney's £825 million fortune. He joined her in the £4,000 seat to Los Angeles, apparently confirming that Sir Paul is still paying his 38-year-old wife a more than generous allowance. And when they landed, he sat in the front as she drove them away from the airport in her car. Friends claim the pair have struck up a close relationship since he joined her staff two months ago. They became friends during one-on-one sessions at the Hilden Health Club in Rye, near Sir Paul's East Sussex home. It is not the first time Mr Amigoni has enjoyed the trappings of first-class travel - but on previous visits to LA with his new boss insiders say he was introduced as one of her bodyguards. Sources claim last time they flew together he was deliberately not checked in with Ms Mills as part of her entourage. At Heathrow Ms Mills - who stands to make £200million in the costly divorce settlement with the ex-Beatle - was seemingly travelling alone, but by the time she arrived in LA she was accompanied by Mr Amigoni.