Mark Webber fastest in free practice ahead of Mercedes . Mercedes driver edges out Red Bulls of Mark Webber and Rosberg . and that could completely change the picture again . '' Home hope Lewis Hamilton three best at Silverstone . Rosberg won Silverstone earlier this season .
Mark Webber fastest in free practice ahead of Mercedes . Mercedes driver edges out Red Bulls of Mark Webber and Rosberg . Home hope Lewis Hamilton three best at Silverstone . Rosberg won Silverstone earlier this season .