Boris Johnson interview about Article 50 being triggered

The speaker expresses optimism about the negotiations between the UK and the EU, emphasizing a win-win outcome that benefits both parties. They highlight the importance of a strong partnership and express confidence in achieving a successful deal. The speaker also addresses the notion of having one's cake and eating it, suggesting that a successful negotiation is possible.

What metaphor does the speaker use to describe the negotiation situation?

What assurance does the speaker give regarding the success of the negotiations?