<i>> "Khan, a member of the opposition Labour Party, which voted against Brexit in a 2016 referendum, based his statement on a report he commissioned from economic consultants Cambridge Econometrics, who estimated how fast the economy would have grown if Britain had voted to stay in the EU."</i><p>So a made up prediction that he paid for. That's not very convincing given that self-proclaimed economic experts also confidently predicted:<p>- 500k-800k job losses in an immediate recession following the vote if Leave won<p>- A loss of trade with the EU upon leaving the single market<p>... neither of which actually happened. The economy grew after the vote, and today the ratio of EU to non-EU trade the UK engages in hasn't changed from before Brexit, which strongly implies the single market was actually useless for Britain in the end.