Scotland’s Vern Cotter says defeat of Ireland is ‘great win – best yet’

• Scotland coach: ‘It changes dynamic if you start with a win’ • Ireland coach Joe Schmidt admits: ‘It’s pretty tough to take’Vern Cotter described Scotland’s thrilling win against Ireland as the best of his tenure after his side claimed only their second victory on the opening weekend of the Six Nations Championship.Two late penalties from Greig Laidlaw sealed Scotland’s victory after Ireland had fought back from 21-8 down at half-time to lead by a point. At that stage they had been facing another gut-wrenching defeat, having been edged out by Australia again in the autumn, but they will now …