New memoir Unleashed admits Vote Leave £350m figure was wrong and criticises David Cameron’s ‘flouncerama’

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The risk to peace in Northern Ireland from Brexit was exaggerated and was used by opponents “to trap the UK in the EU”, Boris Johnson has claimed in his memoir.

The former prime minister’s new book, Unleashed, reveals that many family members urged him to back remain, and concedes that the true figure for UK weekly contributions to Brussels were about half the £350m famously put on the Vote Leave bus.