Just 12 months on from the night of the infamous bank guarantee in September 2008, Matthew Elderfield was announced as the new Head of Financial Regulation at the Central Bank of Ireland. Readying himself to take up his position in January 2010, Elderfield was under no illusions as to the scale of the task that lay ahead of him – to bring law and order to the financial services equivalent of what was viewed internationally as the wild west.   It was an appointment which would change the face of financial regulation in Ireland for some years to come. Just…