Force India's Paul di Resta has confirmed he is no longer working with manager Anthony Hamilton.
The duo began working with each other two years ago, with Hamilton helping secure di Resta's entry into Formula 1 with Force India.
The Scot confirmed on Thursday ahead of the British Grand Prix they have parted ways though, with di Resta now just focusing on his racing,
"I think everything has been said. I can confirm we are not working together. That is the matter at the moment," said Di Resta.
"At the moment I am fully focused on my racing, at the end of the day it is results that count for me and that is what will drive me forward, we have had a good year up to now and aim is to carry that forward."
Di Resta enjoyed a good race last time out at Valencia, with a bold one-stop strategy producing a seventh place finish. However, he feels that a change of strategy could have seen him finish higher and hopes to replicate that form at Silverstone.
"I think Valencia was by far the strongest performance by the team and hopefully we can carry that into this weekend," he said.
"It [one-stop] is certainly a different approach, it starts quite early in the weekend, with what strategy guys come up with. I think our car performed well on low and high fuel in Valencia and in hindsight, we would do the race a bit different if we came back. Coming away with a double points finish, as a team we can be happy with that," he added.