Poland is one of Europe's economic success stories - and after Brexit, Poland stands to become the EU's fifth-largest state. France and Germany had hoped Poland would work with them to find solutions to the EU's big challenges, such as migration. But Poland is taking a different path. Since taking power in 2015, the Law and Justice Party has attacked EU institutions and criticised the German government in particular for being too welcoming to migrants. Tensions came to a head this week with the implementation of a new law in Poland that requires judges to retire when they turn sixty-five. The European Commission has accused Poland of undermining the independence of its judiciary and has launched legal action against the government in Warsaw. So, is Poland implementing necessary reforms or slipping towards authoritarianism?