Lord Coe asked us to bring together Lord Donoghue, who headed Harold Wilson's policy unit and William Hague, the Foreign Secretary and biographer of the former prime minister William Pitt the Younger, to discuss rivalry in politics.

Justin Webb met them both at the Foreign Office and began by asking William Hague how the rivalry between Pitt and Charles James Fox had come about, given that the two men had started as friends?

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