"There will be no downside to Brexit, only a considerable upside" - David Davis, October 10th 2016.
In fairness, he's allowed to change his mind:
"If a democracy cannot change its mind, it ceases to be a democracy."
David Davis (https://www.daviddavismp.com/david-davis-mp-delivers-speech-on-the-opportunities-for-a-referendum-on-europe/)
And now it's time to let the UK change its mind about Brexit as well, right, Dave?