Hamilton, Ricciardo, Ocon and Stroll are on track at the moment. Hamilton's on his 33rd lap of the morning, so Mercedes really hasn't hung around. Mind you, Stroll's on 32 – so Williams is cracking on too.
It does bode very well for Mercedes that both the works team and its customers are racking up plenty of laps. Perez hit a ton in the Force India yesterday as well.
Ricciardo's just put in his best first sector so far.
Ricciardo ends the lap with the quickest final sector so far and improves to a 1m20.824s, just under two tenths behind Hamilton. That's on the soft tyre.
Ricciardo back into the pits after that hot lap, but he's back out now along with Vettel, Kvyat, Ericsson and Stroll.
Make that just Vettel, Kvyat and Stroll out on track now. Kvyat looks like he's on a quick one...
..or not, as the Russian pits the STR12. Seems we're in mid-morning lull territory now.