The debate over the EU referendum is turning into a battle about the border... With leave and remain campaigners involved in a fierce row over what a potential Brexit would mean for this island. The current Secretary of State Theresa Villiers - one of leave's leading lights - says a leave vote wouldn't mean a return of checkpoints at the border. But an old Secretary of State Peter Hain - who's on the stay side - insists there would have to be controls between the countries. And he's on the front of the Irish News this morning accusing Ms Villiers of "freelancing on an exit-Europe crusade at the expense of hard-fought peace and stability".