F1's restrictions on radio communications proved the European GP's dominant talking point, after Mercedes and Ferrari were unable to tell their drivers how to counter engine setting problems - despite the teams knowing the answers. After a series of exasperated radio messages from Lewis Hamilton and Kimi Raikkonen, Sky F1's Martin Brundle suggested the "radio ban has gone too far" and a several drivers have called for a rethink by the sport's governing body, the FIA. With the debate swirling, we look at some of the key questions being asked after Sunday's Baku race... Why couldn't the Mercedes and Ferrari pitwalls intervene?New-for-2016 restrictions on radio...
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