@Pepelarovski: Current air temp is 10 degrees Celsius, it's been steadily rising all morning. We've got Kimi and Wehrlein out on track at the moment, though I've just heard the Ferrari grumbling its way back down the pit lane.
@grahamg: If you look closely at them they are actually a bunch of pitot tubes clustered together. Pretty serious bits of kit and all custom made. Although, no doubt, Ricciardo will throw a shrimp and a burger on it later
@Joe: They have a limit over the whole of testing (pre-season and in-season) but the number escapes me at the moment. They can split and divide them over the days as they want to.
@Not_fun_KIMI: There's plenty of powerful software, but you can't beat running a car in real conditions on a real race track. Vibrations, temperatures, kerb strikes, tyre characteristics - all of these are tricky to simulate exactly with software. But the teams are improving all the time and the amount of testing we do now is just a fraction of what the teams used to do about 10-15 years ago.
@Russ: Aero rigs are fairly common in testing. New bits and pieces are coming to these cars all the time and it can change the characteristics of the air flow. One area Red Bull and a few other teams are exploring this year are blown wheel nuts, which divert airflow from the brake duct and blow it out of the centre of the wheel. The idea is to manipulate the turbulent airflow coming off the tyres and shift it away from the nice streamlined airflow going over the bodywork and towards the rear wing and diffuser.
@graan13: Thanks! We're keeping the times updated manually, hence the gaps in updates and the odd slipped finger on the keyboard.
@PIPPYT: The teams can run whatever livery they want - especially in testing. However, the dazzle camouflage is as much a marketing stunt as a true disguise. You can see an awful lot on photoshop if you know what you are doing with the highlights and shadows tools. But the marketing stunt works as we are all talking about it ... and it looks pretty cool, doesn't it?
Nasr lowers the benchmark again, dropping down to a 1:27.307. Verstappen crosses and moves into second.
@kathy: Nasr is on the medium compound.
@Johannes: Usually we get a better idea at the end of the second test and the start of the third test - although sometimes we are also spectacularly wrong. Fuel loads are the main things muddying the water as 10kg of fuel can be worth as much as 0.35s per lap. Fuel tanks are 100kg, so there is plenty of potential for teams to disguise their pace on heavy fuel or make themselves look good on fumes.
@KrishnaTeja: The Williams and Susie are definitely capable of a quicker lap but it all depends on whether quick laps are in the programme. Williams rarely sets times to grab headlines and at race weekends often runs quite a bit heavier than its rivals in practice. Different teams simply have different ways of working.
To add to that point, Wolff has been completing laps pretty solidly for half an hour now. They haven't been near Nasr's headline time but its clear Williams is focusing on longer, heavier-fuel runs this morning.
@ESPN_F1: Interesting name, is there an echo in here? Anyway, I would say 40bhp is very possible. Renault admitted to being 10% down on horsepower to Mercedes last year, which is roughly a 80bhp deficit. It could be that 40bhp is not enough, assuming Mercedes will also have made big performance gains over the winter.
We have confirmation that Perez will take over in the Force India this afternoon as Wehrlein swaps cockpits to the Mercedes to fill in for the ill Lewis Hamilton.
@Yevgeny: I wouldn't rule out Ferrari completely, but you have to remember the size of Mercedes advantage last year and not underestimate the strides they will have taken over the winter. The Brawn advantage came after a major change in the regulations and was largely thanks to the double diffuser that Honda had been working on for a couple of years when it owned that team. It's much more difficult for Ferrari with stable regulations over the winter.
@mfbull: None that I've seen just yet, but no doubt Ricciardo will have a big smile on his face if it's mentioned at his media briefing later.
@AM: Ricciardo has just re-emerged after a long spell in the garage. Wehrlein is out there too.