The UK has now left the EU. It's a big political moment but, in practical terms, what will it mean for businesses in Northern Ireland? This week John Campbell is joined by David Phinnimore, Professor of European Politics at Queens University; David Henig, former UK government official who worked extensively on trade and investment issues; and Mary Murphy, lecturer in politics at University College Cork and her book 'Europe and Northern Ireland's Future' was published in 2018. They will be discussing the question of what happens next?