Tripoli, December 2010: a plane lands on the outskirts of the capital of Libya, which sits on the edge of the desert and the Mediterranean Sea. A group of Irish bankers are on board, having flown to Libya, then led by the dictator Muammar Gadaffi, to meet the Arab country’s sovereign wealth fund, the Libyan Investment Authority (LIA). Richie Boucher, the chief executive of Bank of Ireland is on board. So too is John O’Donovan, the bank’s chief financial officer, and John Corrigan, who was then the chief executive of the National Treasury Management Agency (NTMA), the state body tasked…