It seems the timing screen lied to me. He hasn't gone anywhere.
NOW Button is out on track.
@kayaay: " Hard to judge in this session as we don't know fuel loads etc. But they've shown a definite step forward in this session. I don't think we'll start to see the biggest jumps until the European season, however.
"The rears are sliding around," Hamilton tells Mercedes.
@jee1: It should work as normal - please do let us know if you're having issues with it and I'll pass it on to our product team.
Speed trap: Rosberg 329.9 km/h, Vettel 329.5km/h, Hamilton 328.4 km/h
Button has been told to box again as "Honda needs to check some more data". McLaren says it is hopeful he can get back out in the final 23 minutes.
I'll pass on the comments about the smartphone guys, thanks for the feedback.
Ericsson asked how long he thinks his tyres will last and replies, "One or two laps. The pace is dropping."
@jee1: Our product team used some engine tokens and we saw some progress in the package.
Approaching the final 20 minutes but there's not been much action on the timing screens as the teams continue their long runs.
Kevin Magnussen watching on from the pit wall. Saw him talking to the head of Carlin Racing earlier today, the owner of an IndyLights team. I heard his appearance in Australia cost him a place on the grid in Indycar this year, so that could be an interesting avenue for the Dane.
The rear of Alonso's McLaren is decked out in that green flo-viz paint. Either that or Hulkenberg sneezed on it.
Everyone but Button currently out on track.
Ferrari is currently lapping slightly quicker than Mercedes was at the same point in their long runs.
"I'm really struggling out of [Turn] two," complains Raikkonen.
@CANAM: He came out briefly but it seems Honda had some problems and asked him to box again.
Seeing a replay of Kvyat and Raikkonen nearly coming together out of Turn 1 as the Finn had a very, very slow drive out of the corner.
@mfbull: That's the bonus of being a customer reader.
@kayaay: Impossible to predict, really. It's certainly possible in the right conditions, I suppose. He certainly looks very handy behind the wheel.
Raikkonen eases past former team-mate Grosjean down the pit straight.
Button is back out on track.