Franz Tost says Gasly's promotion is "mission accomplished!"

It's no secret how the junior driver system works at Red Bull. Their little brothers' team Toro Rosso gives young drivers experience of driving during F1 weekends and prepares them for life at Red Bull. Franz Tost as hailed the system a success following Pierre Gasly's promotion.

The shock departure notice from Daniel Ricciardo left Red Bull having to act. They acted in a typical Red Bull style by signing Gasly. Tost calls this a "mission success."

"Pierre Gasly's impressive performance since he made his F1 debut last year has landed him a drive with Aston Martin Red Bull Racing next year," he said in a Toro Rosso statement.

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The biggest success story so far from the training base has to be Sebastian Vettel. Similarly to Gasly, he spent one year at Toro Rosso before getting the Red Bull promotion.

Likewise, the Gasly deal proves the system is still working. Tost job has been fulfilled and he can work on the next set of drivers.