Evan Davis presents a special election edition of Newsnight from Belfast - with leading figures from the largest Northern Ireland parties. How are the profound changes reverberating through UK politics manifesting themselves in Northern Ireland, with its unique political history? And in this extraordinarily tight election, what cards could the Northern Ireland parties hold in the event of a hung parliament - and how would they play them? In this special Newsnight from Broadcasting House in Belfast, Evan Davis analyses and debates all the issues with key players from the five largest parties. Laura Kuenssberg is in the studio in London.