Red Bull has demanded change from Renault after yet another race in which Sebastian Vettel has failed to finish due to an issue with the power unit. The German lost power on lap five and his race looked to be over however he managed to get going again, but was already a lap down and the team chose to retire him in order to save his engine. Sister team Toro Rosso saw both its drivers retire as well with power unit problems, leading to Red Bull team principal Christian Horner hitting out at engine supplier Renault. "It's frustrating that we're in the situation that we are," he said after the race. "We've obviously had a lot of success with Renault. We've won all the races and...
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