The chequered flag drops and that'll do us for lunch.
After yesterday's unusual session we've got something of normality restored in Barcelona. Lunch is lunch for everyone here so we'll be clocking off and resuming our live comms at 14:00 local time.
@BigBernie: Unfortunately we don't have that data but we are working on getting more reliable tyre data for the fastest laps of each driver. However, even if you have two cars on the same tyres, the age of the tyres and the fuel loads are crucial to getting a proper understanding of what's going on. Unfortunately, the teams don't tell us the fuel levels.
Still 10 minutes until action resumes on track. We've sent Nate down to Ferrari to hear what new team principal Maurizio Arrivabene has to say about testing so far. Nate will report back as soon as possible
@grahamg: It's a good point. The development is minimal and the differences between the cars require close studying of photos. The counter argument is cost, of course, but I believe F1 should find a way to implement a cost cap and then free up the regulations within that spending limit.
Having said that, Lotus's nose was a bit of a shock last year. Even though it wasn't the intention, the 2014 nose regs did create a lot of variation in design.
It looks like Hamilton may be feeling a bit better. Rosberg managed 65 laps in the morning so it may be that Mercedes will split today in order to keep it fair between the two drivers.
@BalazsLengyel: Technically team boss Bernie Ecclestone agreed not to run it again after Sweden, although FISA was looking for a way to ban it. The car won by 34 seconds with Niki Lauda at the wheel, which was a success in terms of design concept. But the point was that we don't see such radical designs anymore.
@mfbull: It's an interesting idea, but the problem of bigger manufacturers working on projects elsewhere that could influence F1. For example, Mercedes could have part of its road car division working on F1 tech that then finds it way onto the hard drive of a member of the F1 team. The money was spent in the road car division, so wouldn't be under the same scrutiny. At least that's the excuse offered by teams, I tend to agree that some form of accounting could nail down budgets.
@BalazsLengyel: I'm not sure I heard that one, but presumably you mean a downforce figure that all teams can't go above? The only problem is that it's very difficult to get an exact reading on downforce. Teams have points systems but even different windtunnels give different results. Where do you measure it from? Each car has a different aero balance.
Perez was the first driver out after lunch. Ericsson has now joined him
@Melwyn: Nate is furiously tapping away at his keyboard to get the news to you as soon as possible. Should be some news on Marussia coming your way in there as well...
Perez returns to the pits after five laps, leaving Ericsson out there on his own.
@DonovanFroon: I'm pretty sure it was a team decision. Rosberg could have slotted in yesterday, but he was also not fully fit due to a trapped nerve in his neck. It may also be that Rosberg does not want to strain his neck too much after a solid morning of 66 laps.
Nate's first story from the Arrivabene press conference is up. Ferrari is willing to supply Manor with last year's engine to help it return to the grid.
Hamilton has just left the pits in the Mercedes
Raikkonen, Perez, Palmer and Ricciardo are out there too. We're not used to so much action