On May 27, he tweeted: "I'm saying this out loud".
He said in a tweet last month that he did not think Jeremy Corbyn's Labour party would poll 38 per cent in the general election on June 8. However, Jeremy Corbyn's Labour party won 40.3% of votes and Matthew, a man of his words announced that he would eat his book on Sky News. "I will happily eat my new Brexit book if they do". The main opposition Labour Party took 262.
Whatever side of the fence you sit on we can all probably agree that one of the stand out moments of the night came when a jubilant Jeremy Corbyn attempted to high-five Emily Thornberry at the Islington North count and found himself slapping her on the breast instead.
Certain the left-wing party faced a walloping, he promised to eat a copy of his own book - Brexit - if Labour received more than 38 per cent support.
Matthew Goodwin, 35, a professor of politics at the University of Kent, is the co-author of "Brexit: Why Britain voted to leave the European Union". Two percentage points makes a big difference, and I am a man of my word.