By Laura Forsyth Mark Kleinman is Sky News’ City Editor and is the man that gets the City talking in his weekly City A.M. column. This week he tackles the FCA battle causing a stir, Bink the loyalty app and NatWest’s share sale. FCA row risks casting shadow over City set-pieceLess than two months to go: no, not until a snap summer general election, but the countdown to what’s widely expected to be Jeremy Hunt’s second and last Mansion House dinner speech as chancellor. It could hardly be simultaneously more and less important for the City. Britain’s financial services sector is in need of a vo…