Quote of the day by Boris Johnson: 'My policy on cake is pro having it and pro eating it' and how it became a key phrase of Brexit

• Boris Johnson's cake quote redefined Brexit.
• No one needs an introduction to the traditional idiom that 'You can't have your cake and eat it too'.
• There are many variations of the age-old idiom but all of them mean that you need to make some sacrifice to get something in exchange.