David Cameron offered Boris Johnson senior Cabinet role if he agreed not to push for Brexit

Johnson tells BBC documentary he played tennis in early 2016 with then prime minister to discuss EU referendum

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David Cameron offered Boris Johnson a senior Cabinet position in return for campaigning for the UK to remain in the EU during the 2016 referendum, it has been revealed

In the event, and with four months to go before the vote, Johnson transformed the terms of the debate by announcing in February 2016 that “after a huge amount of heartache” he was throwing his weight behind the campaign to take Britain out of the EU.