An exclusive interview with the former leader and grandee of the main Unionist party ahead of the forthcoming Brexit deal between the EU and the UK and the standing issue of the role of the European Court of Justice (ECJ): “If the Brexit Protocol is still there, we won’t go back into the executive in Belfast. Anyone in Brussels or London or Dublin who has any care for the peace process in Northern Ireland, should be examining what they’re going to do in the coming days”