Professor Campbell McLachlan - Ever-evolving Brexit battles

Campbell McLachlan, QC, is professor of Law at Victoria University, teaching international law and dispute settlement. He is author of Foreign Relations Law - the first modern study of this field in relation to the UK and the Commonwealth, and  was the only living author whose book was cited (with approval) by the majority in the judgment of the UK Supreme Court on Brexit in Miller v Secretary of State for Exiting the European Union in January.  Prof. McLachlan talks to Kim about a week that has seen a war of words escalate between the Conservative Government of Theresa May and the European Union over the conditions of their 'divorce'.