I don't think he was hoping to change the minds of those who made up their minds ages ago. There are a lot of undecided people who may decide which way this goes and whilst I think many will still be undecided I think he will have persuaded more of the undecideds to choose remain. His strongest point was that if we vote to leave there will be maybe 10 years of uncertainty and problems as we try unpick all the current arrangements, agreements and laws to sort out new trade deals.