Khan, who will be 50 next month, left England in October, 2007 just as the belated inquest into Diana's death in Paris in August 1997, was opening in London. He didn't give evidence, although a detailed statement which he made in 2004 to investigators was read out.
Khan, who met Diana while a young heart surgeon at the Royal Brompton Hospital in August, 1995, is now at Basildon Hospital, where he is one of a team of five heart and lung specialists at the £60 million Essex cardiothorasic centre. And, yes, there is a new woman in his life - one that friends say he might even marry. He is keeping her identity secret, and who can blame him after all that has happened? Khan, then 47, had returned home to Pakistan for the union with a distant cousin, Hadia Sher Ali, the 29-year-old daughter of an Afghan noble. But the relationship was virtually over within months.
A decade earlier, when Khan's businessman father, Abdul Rasheed Khan, had asked him about his future with the Princess, the burly surgeon replied that 'if it ever happened, it would be like a marriage from two different planets'. But now, following his failed marriage, a friend wonders: 'Who could say that the arranged family marriage was any different?'
Moreover, he only said that much because he was 'mad, mad as hell' when he learned that Diana had been seeing the Harrods owner's playboy son. Diana's friends, of course, still believe that she was seeing Fayed only because she had come to realise that Hasnat would never marry her.