Poul Thomsen from International Monetary Fund, Jorg Asmussen from the European Central Bank, Marco Buti and Thomas Wieser: all four were working “clandestinely” for months preparing for a collapse of Greece’s banks. Their secret blueprint, known as “Plan Z”, was a detailed script of how to reconstruct Greece’s economic and financial infrastructure if it were to leave the euro. From the Financial Times series and the excellent work of Peter Spiegel.