According to word from Silverstone, Lotus is poised to announce its switch from struggling Renault to leading Mercedes power for 2015.
Fernando Alonso was third again today, while in the other F14 T, Kimi Raikkonen ended up ninth.
Speculation he might abandon retirement with a new prominent role at Maranello surfaced in May.
Third in-season test of the year to take place after british grand prix, with Ferrari, Marussia, Red Bull And Lotus all testing for Pirelli.
"If he can't drive in F1 anymore, he should go home" - Jacques Villeneuve.
A Ferrari insider insists the story is "not true".
Caterham says they aren't going anywhere, but in a surprising twist, is Ferrari?
More attention now to be shifted towards the 2015 project.
Scuderia Ferrari continued a busy programme of evaluation of the latest updates fitted to the F14 T.
"He's just going a little slower than Fernando at the moment, but that gap is closing as the year progresses" - James Allison.
"I need to think about it and then choose the best option for next year," said Domenicali.