@McNeilNtandoMdluli: Hamilton is still in the pits. Yesterday Rosberg also had a period around midday in the pits as the team made some changes to the car. It's a sign of how far Mercedes are through their schedule that they can afford to spend big portions of the day in the garage for "experimental" set-up changes.
@iker: Your guess is as good as mine. Most likely the future direction of the engine regulations, but maybe they had a quick chat about the lovely weather in Barcelona today.
@Michael: Probably changes under the skin of some sort or another. Sadly the teams aren't that forthcoming with giving exact details of what they are up to. In a sport where you'll get a nasty look for taking a photo of the rear of a car, they don't tend to be too specific.
@Mike: They are desperately trying to get a car ready in time for March 6 when the car is set to fly to Melbourne. It has to be fully compliant with the 2015 regs, so that means building and crash testing a new nose and meeting all the other crash tests. It won't be easy considering the team only came out of administration nine days ago.
@Michael: All the top teams will have little changes planned for Melbourne too. Two weeks is a long time in F1 and the lessons learned from the first two tests will have already resulted in new ideas being transformed into reality for Australia.
@Mo: Yes, it looks like the promised race sim is underway.
@Mike: The biggest change is to the nose, which has forced a redesign. When you redesign the nose it has a big impact on the rest of the car behind it.
@McNeilNtandoMdluli: He still has the afternoon. Besides, sampling tyres here in the cold track conditions won't necessarily translate to the reality of the same tyres on a different track in different temperatures. Fortunately Hamilton has been in F1 since 2007 so he has plenty of experience no matter what.
Kimi has just pitted and gone back out as a part of his race sim. Roughly 22 laps completed so far. A race distance is. A race distance is 66 laps here so that's one third of the way through - most likely a two-stop strategy. Hard tyres are now on the Ferrari
@Canuck: Hopefully we'll be able to dig it out of the teams by Melbourne. They won't have decided finally just yet. The results of this test will tell them what new performance parts are reliable enough to put on the car for the first homologated engine.
@Prads: Kimi is now lapping in the 1:29s with two thirds of his fuel still on board. He's quicker now on the new hard tyres than he was when the car was fat with fuel and on mediums at the start of his race sim.
@BarryLauer: A doctor giving the all clear. Alonso himself is fine, but was advised against taking part in this test. Concussion/head injuries are dangerous because a repeat accident soon after can cause more damage than the first one. All the scans are normal, so it should just be a precaution for this test and then hopefully he'll be allowed to race. However, I'm not a doctor and only a doctor will decide if he is ready.
@shailesh: Really hard to say without knowing anything about the car other than it has a 2014 Ferrari PU. It will be very tough if they have any problems with the car from the start - the practice sessions will be crucial.
Kimi's laps either side of his pit stop:
(Pit for hard tyres)
@Ambrose: We'll ask McLaren this evening where they are - Boullier and Arai speak at 17:00. Just looking at the lap times it's impossible to tell how much power they are running because 100% power could be masked by heavy fuel and vice-a-versa.
@lan: Hamilton is in the garage. The last update we had from the team is that they are making "experimental" set-up changes. So we should see him back on track in the afternoon.
It was in the final hour yesterday that Rosberg set his super-quick lap time on the softs. So maybe we'll see the same from Hamilton
@CaseyStoner: I assume you mean the aero rakes or rigs the team's add to the cars? They have lots of Pitot tubes that measure airspeed and pressure at that point. They often put them behind or in front of tyres to monitor those areas which are particularly sensitive to airflow disruption.
@bitch: Mediums. We haven't seen him on anything softer yet.
@Leo: I don't remember the difference being that big. But assuming you are right, it could be down to set-up - wing angles - or engine settings, which may also be related to where the engine is in its life cycle. Although I don't have them to hand to prove it, I think those stats are incorrect.