Confirmation that the FIA has summoned Mercedes to face an international tribunal following its Barcelona test with Pirelli has produced a couple of twists to an already convoluted tale.Both the team and tyre supplier insist that they were given approval to conduct the 1000km session at the Circuit de Catalunya with Mercedes' 2013 car, despite such an action being contrary to the F1 rulebook, which prohibits contemporary machinery from being employed lest it provide an unfair advantage at a time when in-season testing is expressly outlawed.Mercedes' defence is now rumoured to include an email from FIA race director and safety delegate Charlie Whiting which, it is alleged, granted...
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