Hamilton has ticked over to his 102nd lap of the day.
Kimi and Lewis the only men out on track.
@SteveTaro: Not at the moment. McLaren are usually pretty good at keeping people informed of what's going on so hopefully we'll know something soon.
Raikkonen has come out for a fresh run and is pumping out laps on the soft tyre, his latest a 1:21.968.
Massa the latest man to enter the fray. Lewis is back in the garage.
@SchumiTheGreatest: Nothing new recently. Remember, take any news you hear from sources other than both families with a pinch of salt.
We didn't see a very optimistic Grosjean last year - his first impressions of the E23 seem to have left him in a good mood.
Just as I was about to write it looks like his day is over....
@rockedin123: At this stage of the season teams will only have one car. Tweaks can be made to either, obviously, but the stickers are pretty easy to change every day.
@shushy: He was on soft tyres so it's likely he was on low fuel.
@Canuck: Track temperature is 21 degrees Celsius. I haven't been keeping track of every headline time but Kimi's most recent was on softs.
We're into the final hour of testing.
@Siddhesh: Ferrari really hasn't been doing long runs, it's been doing handfuls of small bursts.
Ericsson has improved on his personal best 1:23.257 - which leaves him fifth.
So another early finish for McLaren but at least it managed to get something under its belt.
Though 79 laps over four days is hardly ideal.
@rockedin123: They have all the tyres available.
@Jonn: It starts in Barcelona on February 19.
@hacke: No, that seems to be a Rosberg trait. I have no idea where Lewis eats his lunch but Mercedes never seems to tweet about it.
Kimi pits but then re-joins the circuits three laps later. It's just him and Ericsson out there.
Ericsson sets a new personal best to move into third.
@MelhemSakr: Yes, well timings are pretty irrelevant at the moment but I've been impressed with the mileage both have accumulated. Toro Rosso has a really exciting line-up this year and both Sainz and Verstappen have put a lot of mileage under their belt early on.
@SpittingCobra: Kimi hasn't, no.
As we approach the final half hour of the session, Kvyat and Massa are on track.
@bongc888: They're not an indicator of anything, it just means Ferrari were focused on their short runs rather than longer runs. The most I can remember Kimi doing is 12 laps before coming in.