By Ali Lyon Advertising giant Havas London must be stripped of its B Corp status if its sister agency keeps its global contract with Shell, the founder of another B Corp accredited agency has said. Havas London and five other Havas agencies are currently the subjects of a formal investigation by B Lab, the gatekeeper of the coveted B Corp accreditation, after its sister agency, Havas, signed a global contract to place advertisements for Shell. Now, with the result of that investigation expected within a fortnight, Chris Norman MBE, the founder and CEO of Good Agency, has told City A.M. that al…