@padraig: As ever with testing or practice, the teams do not reveal how much fuel is on board or which engine modes are being used. Which is why it's always wise to not to read everything into the headline times.
@Siddhesh: Easy tiger. Early days yet.
@SaptakDas: Well Red Bull's zebra is currently hibernating as well.
@Siddhesh: Haha. Hard to tell on here!
@Charlton: 5pm local time.
@JJ: It's still the same.
@BobMichel: Teething problems, especially on the first day today, was always going to be an issue for McLaren and Honda at this stage.
After a brief period of silence, Bottas returns to the track.
@Arvind: Not exactly. Don't forget, McLaren only completed a handful of laps when it had Honda power in its 2014 car at Abu Dhabi last year.
@hacke: GP3 champion was in the pits earlier in his role as Williams reserve driver - he was there for a photoshoot of the new car alongside Susie Wolff and the senior drivers.
@NanduSreevalsan: It may not happen that quickly, plus this test is likely to be more about mileage than outright pace. I expect pace to improve most in Barcelona.
@PaulNijjar: Not at the moment. Other than Bottas, it's all a bit quiet out there.
@XanBeX: I'm sure, yes. It expected a slow start today.
Sainz Jr and Vettel have now joined Mr Bottas out on track.
@Quadge: That could well be part of it. But the added photos and coverage is a great marketing ploy.
Is it a bull, is it a zebra? No it's Daniel Ricciardo, who becomes the fourth man out on track.
Ricciardo's run lasted just one lap. Vettel has also returned to the pit lane.
Sainz and Bottas both lapping in the 1:25 mark at the moment.
Those two men return to the pits and Ricciardo heads out, joining Rosberg, who managed to slip out unnoticed.