@mg: Very early days yet, we're only half an hour into this session. But McLaren is still making up for lost running over the winter.
They've kept colours more or less the same from last year, though with a hint of black on the new shirts.
To recap, we're two teams short in this session. Manor Marussia have engine software issues - completely understandably after missing so much testing - while Sauber are unlikely to run as the Van der Garde situation continues.
@charlybt317: The last forecast I saw suggested overcast days today and Saturday, with a spot of rain possible on Sunday.
@TailPipe: They created accounts for the two power units used at this weekend. Good, clean fun.
@MichaelGordon: Mercedes certainly looks pretty comfortable, both in the early stages here. But from what I saw from my two weeks in Barcelona it is clear McLaren has a great car at its disposal again.
@Ash: Engines are limited to team not to driver.
@Rodster: Which conservative engines do you mean? If you mean turned down engines, I would suggest yes - this is practice after all so it's unlikely any of the teams are running at the absolute maximum. At least that is until we see some longer runs later in the session.
Local boy Ricciardo is finally out on track.
Hamilton is told about a tailwind into Turn 1 and Turn 4, while there is a headwind into Turn 9.
The guy was asking for it, with a name like that.
@CaseyStoner: Not yet. We should find out from Honda at some point this weekend.
"I'm doing a bad job on the engine management. Keep pushing me," says Rosberg. Interesting radio message from the German.
@Deshaneo: Yes. The "tokens" are what the manufacturers have to develop their engine. This year, teams can develop 48% of the engine - albeit without using up their tokens. Development can be spread over a season, this year, unlike 2014.