From the remnants of monarchy to Communism, democracy, war and the EU: Croatia 1945–2011. The Kos family argue, adapt, fall in and out of love. Tena Štivičić talks to Susannah Tresilian about 3 Winters, her new play for the National Theatre directed by Howard Davies. http://www.nationaltheatre.org.uk/shows/3-winters #3Winters