In 2016, shortly before the EU referendum, Yanis Varoufakis warned that the UK was destined for a “Hotel California Brexit”: it could check out but it could never leave. The former Greek finance minister spoke from experience. In 2015, his efforts to end austerity – “fiscal waterboarding” – were thwarted by the EU (a struggle recorded in his memoir Adults in the Room: My Battle With Europe’s Deep Establishment).