Cleverly was referring to a famous comment by
Michael Gove, the Brexiter Cabinet Office minister, in
a speech (pdf) he gave during the referendum campaign on 16 April 2016. Gove said: "The day after we vote to leave we hold all the cards and we can choose the path we want." This is frequently cited as evidence of how Brexiters exaggerated or misunderstood the strength of Britain's post-Brexit negotiating position. Gove has
recently defended his claim, implying he meant not that Britain would hold all the best cards, but just that it would hold its own cards.