Today marks the 100th anniversary of the birth of Enoch Powell. One of the major figures of post-war British politics, he was brilliantly clever - reading Ancient Greek at the age of five, for instance, - but he was accused by his detractors of using that great intellect badly: giving cover to racism with his warnings about immigration.

Powell's biographer, the writer Simon Heffer, and political documentary-maker Michael Cockerell, who created an in-depth television profile of the man, discuss the life, character and legacy of one of this country's most controversial statesmen.

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