If there was one voice you heard during the tumultuous days of Brexit, more than any other it was John Bercow. 

He was elected four times as the speaker of the House of Commons, the only way to be elected that many times since World War Two. 

He stepped down late last year as Brexit reached its conclusion, and now he's telling his story in his new book Unspeakable. 

John Bercow joined Mike Hosking to look back on his career and what we can expected from his new book.

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