Red Bull consultant Helmut Marko says the team expects to make a “significant step” forward when Formula 1 returns to Europe for next month’s Spanish Grand Prix, with a 'revamped' chassis. Red Bull has emerged as the third-best team so far in 2017, behind pacesetters Mercedes and Ferrari but comfortably clear of the midfield pack. The outfit has so far struggled to fully exploit its RB13, while power unit supplier Renault has also encountered a handful of issues, but Marko insists gains will arrive in the coming weeks. “We have two problems: Renault had some reliability issues, which have slowed them down in the development; and we didn’t deliver the chassis...
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