@Parth: They tweeted earlier about a few "niggly" problems which were keeping them in the garage. Said they should be sorted imminently but, as it stands, they are yet to re-emerge from the garage.
@Christos: Just an issue with the car.
@LachuChelsea: There are changes in regulations every year, such as the new noses for 2015. Regulation changes are how Formula One evolves and manages to remain the pinnacle of the sport.
Verstappen's extended time in the garage comes to an end as he navigates the STR10 down the pit lane and onto the circuit.
@Aly: It is probably contributing to today's issues. A massive overhaul is very difficult as the design ultimately defines how everything underneath the skin of the car works.
Lots of rain falling now.
Everyone comes back into the pits, will be interesting to see if we get any more running.
@TiredTifosi: The raspy Honda sounds more like the bullish Mercedes engine than the quieter Renault.....
Vettel has completed 78 laps - if there is any more running this afternoon he could get close to matching Hamilton's 91.
With the amount of rain currently falling on the circuit I would wager it is unlikely we will see any more tmies set today - at least times which change the running order.
@martin: I think so. Ron Dennis said last year, correctly, that it is impossible to win the world champion as a customer team.
A few noises coming from the McLaren garage....
Though some teams may stay in the garage, McLaren may well want to use this final half hour to check it has rectified today's problems ahead of testing tomorrow.
We have some action on track.
Verstappen, who had only just come out for a stint when the rain started falling, breaks the silence.
Nasr follows Verstappen's example and heads out onto the circuit. It's an all-rookie affair out there.
@RamPrashanth: I think it's too early to make predictions, we've only had two days of testing after all.
Verstappen's first wet lap is a 1:44.215.
We're approaching the final half an hour as the two rookies continue circling on a damp track.
Verstappen returns to the pit lane. His wet lap 12 seconds quicker than the only timed lap we've had from Button in the dry....