Diana's 'Mr Wonderful' Hasnat Khan treating Pervez Musharraf "He's still under observation," said Muhammed Ali Saif, his lawyer, on Monday. They've been doing tests and procedures and there's no doubt he's sick. Confirming Dr Khan's consultation, Mr Saif said: "He's a civilian cardiologist in Rawalpindi and works at the Armed Forces Institute of Cardiology on a visiting basis." Dr Khan and the Princess enjoyed a two year relationship which ended just prior to her death in 1997. In the intervening years Dr Khan has shied away from publicity, but recently expressed his disdain to The Sun newspaper about Diana, a biopic about their relationship. I haven't seen the film and I haven't met anyone who has seen it, but I can tell you for sure that it's based on a superficial idea. This film is trying to open things up again," he said. The revelation is the latest twist in the Musharraf treason trial. On Thursday after pressure from the three-member judicial bench, the former Army chief was ordered to appear in court to face the charges. But a senior police official informed Justice Faisal Arab that he had taken ill with "heart problems" and was diverted to the specialist military hospital close to the capital city. On Monday, the retired general spent his fourth day in care awaiting test results. It is understood that Dr Khan is being consulted over whether the former President should be moved abroad for treatment. He has been placed on Pakistan's Exit Control List, however, and the courts have demanded that his doctors produce a medical report on Tuesday. It's not clear whether Dr Khan will be compiling that report. Dr Khan enjoys strong ties with the medical profession in the UK and was pivotal in the decision to move Pakistani schoolgirl Malala Yousafzai there after she was shot by the Taliban in 2012.