The man largely credited with turning around the fortunes of the Marussia team will quit his consultancy role with immediate effect.

Pat Symonds began working for the Banbury-based team in the spring of 2011, the start of the team's second season in F1, and continued in that role until this week, when it was agreement that the two parties should go their separate ways.

"I have thoroughly enjoyed my time with the Marussia F1 Team over the course of the past two-and-a-half seasons," former Renault engineering chief Symonds commented, "The team has developed immeasurably during that time and it now has all the right people and resources in place to achieve great things in the future. I wish the team the success it so richly deserves."

During the course of his time with the squad, Symonds has overseen the implementation of a technical team for the future, blending incumbent personnel with new team members from within the sport to create what is now a very robust technical structure with real strength in depth in all key areas.

"For the Marussia F1 Team, each new season has seen a significant step change in terms of our growth and development at every level of the operation," team principal John Booth reflected, "The extent to which we have progressed was particularly evident as we embarked on the 2013 season, when our performance demonstrated just how much we have matured from a technical point of view.

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"We have some very talented design and engineering groups in place who have achieved great things over the past few seasons and who are excited about maintaining our current positive trajectory, boosted of course by our new powertrain partnership with Scuderia Ferrari. We would like to thank Pat for the contribution he has made to the development of that structure, [and] look forward to announcing plans for our continued growth when it is appropriate to do so."

The statement accompanying Symonds' departure reveals that he is 'moving on to explore new opportunities' and, while it is not yet clear whether he is moving on to another position in F1, it is worth noting that this year sees the end of a ban preventing him from holding a fixed position in the top flight for his part in the 'crashgate' saga that beset his former team.