On the 50th anniversary of Jochen Rindt becoming F1's only posthumous World Champion, we speak to those who knew him best - including Sir Jackie Stewart, Bernie Ecclestone and Helmut Marko.

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The Dublin-born star (seen with Lewis Hamilton, top; and right, with his wife Marie) has prostate and bladder cancer, which he said had spread over the past few months. Jordan, 76, said he had ...