On 11 July 2016, Theresa May launched her campaign for the Conservative leadership in Birmingham. She said: “Brexit means Brexit, and we’re going to make a success of it.” As prime minister, she used the phrase again in her speech to the Conservative conference in October 2016.
The phrase left unclear what leaving would mean in practice. In October 2016, the Labour leader Jeremy Corbyn told the Commons: “I am sure she will tell us one day what it actually means.”