for the full British Grand Prix FP3 times
Lewis Hamilton reasserted himself at the top of the timesheets ahead of qualifying for the British Grand Prix, while Merceas Nico Rosberg lost more crucial track time with an oil leak.
The championship leader had declared 'work to do' after the first day of free practice, but overnight tweaks appear to have done their bit to give him more confidence in the Mercedes as he stopped the clock in a best lap of 1min 32.917secs in the final minutes of the session.
It was enough to put a comfortable half-second margin between himself and Rosberg, who popped up into second place in the closing seconds. More concerning for the title challenger, however, will be the fact he was forced to miss part of the session due to an oil leak, the second time-sapping technical issue to have cost him mileage at Silverstone this weekend.
Kimi Raikkonen once again led the Ferrari challenge in third position, seven tenths adrift off the top spot, comfortably ahead of team-mate Sebastian Vettel, a further three tenths back.
Behind them, rookies Max Verstappen and Carlos Sainz once again impressed for Toro Rosso over a single lap in fifth and sixth positions, the pair heading up a tight mid-field bunch that would see just a second cover fifth to 13th.
Felipe Massa and Valtteri Bottas posted overnight improvements for Williams in seventh and eighth, with Red Bull's Daniil Kvyat and Lotus' Pastor Maldonado rounding out the top ten positions heading into what promises to be a closely contested battle to reach Q3 later this afternoon.
Elsewhere, Fernando Alonso managed just six laps in the McLaren to find himself rooted to 18th on the timesheets, ahead of only the Manor cars, while Jenson Button fared little better in 16th.