By Mark Kleinman 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 Royal Mail shareholders, Revolut’s latest valuation, and Hargreaves Lansdown stocks. Czech is on way to sceptical Royal Mail investorsRoyal Mail shareholders beware: your cheques aren’t in the post just yet. Rarely has there been as sizeable a deficit between an offer provisionally recommended by a public company board and the prevailing stock price as in the case of International Distributions Services (IDS). The 370p-a-share proposal pitched b…