"We [the very small majority and David Cameron] made a mistake."
What all 17,410,742 of us, jo? Add to this five out of six MPs who endorsed our decision two years ago.
Nothing has changed since the decision was made. All that has happened is that the EU - quite predictably - has offered the UK a "leaving treaty" which is every bit as bad and in some respects worse than the Treaty of Lisbon to which we are currently subject.and which we voted to withdraw from. As you say, it is uncertainty that gives business the jitters. They need the certainty of a clean break.