[Jody Barton]

NeilP the situation at Williams is that they have two pay drivers. So they both have a slightly stronger hand than most drivers do. However, there will be performance break clauses. Soooo, yeah, Sirotkin might be missing those right now. As to how they could replace him? Wehrlein has a boatload of Mercedes cash behind him, as does George Russell, but more importantly Kubica's has a ton of cash.

The situation with Ericsson is different, and altogether more complicated. Ericsson doesn't bring any cash to Sauber, instead Sauber's major shareholders, a Swedish firm, want Ericsson as a driver, but Ferrari now have a much bigger stake in Sauber, and potentially a much bigger say. Ericsson has been beaten by every team mate he's had, even with the team favouring him. He's got to be on shakey ground.

Hartley is probably in the most precarious position of them all. He has no money backing him, he was part of the RBR young drivers program. A program that is full of very talented youngsters, so his pressure is very different. Do I believe TR and more importantly RBR will replace Hartley mid-season? If he doesn't perform, and they have a ready made replacement, then yes, they'll pull the trigger. I do however believe he has a fair few more races before any decision is made either way.