Walker dropped out of the second race after a collision with Karl Muggeridge's Honda.

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Around the same time Radio 1 department head Derek Chinnery was asked by Mr Muggeridge to confront Savile with the allegations.

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In 1973, the then Radio 1 controller Douglas Muggeridge asked his press officer, Rodney Collins, to find out if the rumours about Savile were true.

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