Mercedes chief Toto Wolff says teams will need further clarification on what they now can and can't tell their drivers on the radio following the FIA's "controversial" decision to clamp down on pits-to-car messages.It emerged on Thursday that FIA Race Director Charlie Whiting had sent a Technical Directive to all teams detailing that from next week's Singapore GP 'no radio conversation from pit to driver may include any information that is related to the performance of the car or driver'.With the directive thought to include an effective ban on such things as drivers being told about the state of their tyres and speed through the various sectors of a lap, both teams and their...
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