Five minutes until the track is open again. A bit of rain to mix things up in the afternoon? There's a 56% chance it will hit the circuit at some point.

You never do see Mika Hakkinen and Megadeth's Dave Mustaine in the same room, do you?

Right, as promised - the total laps by team so far in testing. 

Remember, these are totally unofficial and very much the product of my coffee-starved brain. Once again though, I'm pretty certain they are spot on.

Mercedes: 589

Toro Rosso: 412

Williams: 351 

Sauber: 344

Ferrari: 331

Red Bull: 330

Force India: 294

Renault: 257  

McLaren: 257  

Manor: 246 

Haas: 225

Good to see my fellow scribes getting in on the F1 celebrity look-a-likes. Here's a cracking shout from Will Buxton.

Image source, Getty Images

Right then, time to bust out my cheese and salad cream sandwiches (living the dream). Give me a second, and I'll pop together the total number of laps for each team so far this week.

Andrew Benson
Chief F1 writer

Kevin Magnussen is second fastest so far on this final day of the first test on a one minute 25.2 seconds lap and things are looking up at Renault, despite a few reliability quibbles. The French manufacturer has made no secret of its ambition to win again eventually on its return as a team owner but has also made it clear it expects a difficult year. That’s because it has taken over a team at late notice that has been starved of resource for two years. But in fact it is fair to say the new car - which was initially designed for a Mercedes engine before having to be hacked about to fit in a Renault - is performing beyond expectations in Barcelona. 

Trackside operations director Alan Permane told BBC Sport: ‘The design and manufacturing teams at Enstone have done an incredible job. The aero development work we have done has worked very well and the car is a good step up on last year’s aerodynamically.’ 

Permane said he could not comment on engine performance, but the word on the street is that Renault have found 50bhp over the winter. That would still put them something like 50bhp down on Mercedes, assuming the champions have made the expected 20-30bhp improvement, but it is a significant step forward and a good sign for the future for both them and Renault-powered Red Bull.

Kimi Raikkonen 1:23.477 58 laps (lap set on ultra soft)

Kevin Magnussen 1:25.263 67 laps (lap set on soft tyre)

Max Verstappen 1:25.393 75 laps

Daniil Kvyat 1:25.900 57 laps  

Felipe Nasr 1:26.053 50 laps

Lewis Hamilton 1:26.295 99 laps

Alfonso Celis 1:26.875 36 laps  

Rio Haryanto 1:28.266 43 laps 

Felipe Massa 1:28.684 28 laps 

Esteban Gutierrez 1:29.088 33 laps 

Fernando Alonso No time 3 laps  

Annnnd it is lunchtime.

Kimi Raikkonen finishes the morning session with the fastest time - a 1:23.477 set on the ultra soft tyres.

Lewis Hamilton down in sixth but was never gunning for a fast time. Instead, he was once again ticking over the lap counter as he finished on 98. McLaren only managed three laps after 'water pressure data anomalies'.

Times and laps in full to follow.

Great scott!

F1 journalist Dan Knutson in Barcelona: "Don’t expect to see any really fast lap times from Mercedes. The team does not plan to run Pirelli’s super soft or ultra soft compounds until the next test."

I can certainly get the teams' total laps for you at lunch Rob. May take me a tad longer for individual drivers.

Ten minutes until lunch and there are three drivers out on the circuit - Lewis Hamilton, Daniil Kvyat and Max Verstappen. 

No-one has the ultra softs on so it looks like Kimi Raikkonen will be top of the pile come the break.

I won't lie JK, I am a little scared.

Kimi Raikkonen has the ultra-soft tyres on and goes even faster, storming round the circuit in 1:23.477.

The fastest time of the week so far was set by Raikkonen's team-mate, Sebastian Vettel, on day two. Vettel clocked 1:22.810, also on the ultra soft compound.

I've seen the teams' hospitality food, it is good. So good, in fact, that I once brushed past Kylie and Dannii Minogue to snaffle a sandwich at Honda at the 2007 Australian Grand Prix.

I digress. The point I'm trying to make is that it has quietened down on the track as lunchtime approaches, just Lewis Hamilton, Daniil Kvyat and Kimi Raikkonen out there.

Andrew Benson
Chief F1 writer

Ferrari’s Sebastian Vettel left the test on Tuesday with the fastest time - and he still holds it now - but he said that more important was that team-mate Kimi Raikkonen confirmed his positive impressions of the car when he drove it.

The good news for Ferrari is that he did on day three of testing, despite half a day lost to what the team said was a fuel-system problem. ‘The first feeling is quite nice,’ Raikkonen said. ‘I’m sure it'll be good - we just need more time in the car, working on different things and trying different things. It's already a better car than what we had last year so we're doing the right thing. Overall, the handling is good in many areas where we felt we had to improve on last year - front end was one and there were many other areas. I think the team has done a very good job, obviously we're now just starting to get it ready and we still have a lot of work to be done, but I'm sure it'll be a good car for us.’

The bad news? Well, it’s not clear yet that there is any. But of course the key question is whether it is good enough to challenge Mercedes. That one does not have an answer yet - but it is clear the world champions are as formidable a force as ever.