I detect some confusion about what a lie is and is not. Being wrong is not a lie. Nigel repeatedly said we would be leaving on March 29th but he said it in good faith. It turned out not to be true, but that does mean it was a lie, just false. Equally, when Teresa May said it - at least to begin with - it was said in good faith and so mistaken, but not a lie.

Thomas Aquinas back in the middle ages said that the essential characteristic of a lie was the intention to deceive, and in my book that is right: it is about deception, not whether something is true or not. So arguably if Teresa May continued to say we would leave on March 29th after she knew we couldn't that would be a lie, but while it was said in good faith it was not.

So it boils down to whether Boris' references to the £350m were believed to be an accurate representation of the benefits or were intended to mislead. In my opinion, it was intended to mislead. In short, a lie.