Who would have thought it? The dusty, slow to act, legalistic and over-cautious City regulator, the Financial Conduct Authority (FCA), daring to bring criminal money laundering charges against Natwest. The decision to steam ahead by fresh chief executive Nikhil Rathi indicates that regime change could mark a new era of activism. If that is the case then Neil Woodford, subject of a probe into the implosion of his investment empire, better look out. Even Greensill, which so far has managed to slip between the cracks in UK regulation of shadow banks, could be in the firing line. New sheriff in town? FCA chief exec Nikhil Rathi's decision to charge Natwest with Money Laundering indicates that regime change could mark a new era of activism