In this podcast, Professor Christian Tams and Angeline Welsh discuss State Succession. The once relatively dormant doctrine of State Succession - which notably deals with the application of treaties to newly-established States - is back on the agenda with renewed vigour. Its most recent high profile exploration has been in the Sanum litigation, which turned on the application of PRC/Laos BIT to investors incorporated in Macao . The CIS region in particular may still have issues to grapple with, as investor invoke BITs concluded with the Soviet Union in proceedings against successor States such as Kazakhstan. Looking ahead, claims for independence and statehood - from Catalonia to Scotland and even, fleetingly, London in the immediate Brexit aftermath - would directly implicate the doctrine of State succession.