A hydraulic leak saw McLaren-Honda’s opening day of the final pre-season test at the Circuit de Catalunya end with only seven laps completed. It was another horror day for the team, who have had endless issues with their new MP4/30, in particular a MGU-K seal, but the team were forced to end their day shortly after lunch. 'We're bringing the shutters down on today – a hydraulic leak means we need to change the engine. #TestingIsTesting,' read a tweet from the team’s official Twitter page. Jenson Button managed to complete one timed lap in that time, but his 1m31.479s was almost eight seconds adrift of the outright pace set by the Williams of Felipe Massa. Button is scheduled to...
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