
From the outside, Formula 1 testing can throw up a lot of questions and not a lot of answers.
But during four days of activity at Barcelona, there were plenty of hidden indicators of what lies in wait in the 2016 season, gleaned from what happened on track and from speaking to those working in F1 teams who know plenty about what's really going on.
In Spain, we saw 10 new cars completing an astonishing number of laps, with Mercedes lapping almost continuously, Ferrari topping the times and a new team on track in Haas.
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