The Tories, though, are the party with the momentum after the success of their move on National Insurance. They are also benefitting from some mistakes by their opponents. First, Peter Mandelson doing just what George Osborne wanted him to do and going after the business leaders who had signed the letter in support of the Tory position. This gave the NI story legs and meant that it stayed at the top of the news agenda for far longer than it otherwise would have. Second, Chris Grayling’s remarks on whether B&Bs should be able to turn away gays would have caused the Tories much more trouble if they had come out next Sunday rather than on Easter Sunday when politics was not going at full speed.