Image source, Jennie Gow

With everyone back in their respective team garages, Fernando Alonso once again has his shades on, just as he did in yesterday's news conference. Disgusting behaviour from Alonso by wearing sunnies indoors? Or is there an acceptable explanation?

Fortunately, it is the latter, with the Spaniard revealing he has a stye - an inflammation of his eye.

"They recommend not to be too much in the artificial light," he said. "I try to protect a little bit the eye today and tomorrow to be ready for Saturday and Sunday."

Ferrari on Twitter: Remembering Gilles #27

Image source, Scuderia Ferrari

Daniel Ricciardo certainly does not seem too bothered. He is busy trying to convince a Red Bull staff member to join him in throwing an Aussie rules ball around.

Tom Clarkson
BBC F1 pit-lane reporter

"Red Bull have confirmed it is a problem with the internal combustion engine, they would not elaborate on that but they say it is fixable and they expect Dan to be out prior to the end of the session."

A notable absentee from the timesheet is Daniel Ricciardo. The Australian is back in the Red Bull garage having completed just two laps so far and there looks to be some work being done on his car, with our pitlane reporter Tom Clarkson reporting possible issue with his power unit. Uh oh...

Nico Mcm: Senna JPS Lotus contest over. Together with the intimidating yellow helmet you knew to get out the way.

Image source, Getty Images

Kevin Conway: Always had a soft spot for the Arrows A23 livery.

Image source, Getty Images

Just over 30 minutes into first practice, so here is a little look at how the top of the order is shaping up.

Andrew Benson
Chief F1 writer in Barcelona

"This is one of those landmark weekends for Toro Rosso driver Carlos Sainz Jr. The Spaniard is now a friend of Fernando Alonso, but he still refers to the McLaren driver his hero and says that racing at home at the same time as him will be an emotional experience.

"Sainz, who has impressed in his first four grands prix, says that his father, the eponymous rally legend, brought him to this race as a 10-year-old in 2005 and it was a defining moment in his life.

"'It will always be a very special weekend for me,' Sainz Jr said on Thursday, sitting alongside side Alonso in the pre-event news conference. 'I remember being here 10 years ago for my first grand prix when I came to watch, meeting some important people, meeting my idol here on my left, Fernando, for the first time, when he was in Renault. That was a big shock for me and an amazing experience and probably thanks to that it's where I took the decision that I really wanted to be an F1 driver one day. Ten years later I am here achieving my dream."

Image source, Carlos Sainz

While we are all tucking into our morning cereal and cracking on with our daily routine, Carlos Sainz is realising a dream.

The 20-year-old Spaniard met Fernando Alonso, who he idolised as a child, at the Spanish Grand Prix 10 years ago, when he was just starting out in karting and always hoped to share the same bit of tarmac as his hero at his home race.

Well, now he has done just that, with both having been out on the circuit this morning.

Andrew Benson
Chief F1 writer

Image source, Getty Images

"Ferrari team principal Maurizio Arrivabene is wearing a badge sporting the number 27 here today. That is in memory of the legendary Gilles Villeneuve, who was killed on this day 33 years ago, in qualifying for the 1982 Belgian Grand Prix. For some, the great Canadian, who used the number 27 in 1981 and '82, is the fastest racing driver there has ever been."

Times are getting closer to Lewis Hamilton's fastest time of 1:27.023 in first practice for last year's Spanish GP. Hamilton himself getting close with 1:27.509 to knock Sebastian Vettel off the top of the timesheet.

Raffaele Marciello, in the Sauber in place of Marcus Ericsson, has a moment at Turn 9, briefly running wide, but holds it together and gets back on the circuit.

A few more times creep onto the board as Marussia duo Will Stevens and Roberto Merhi take advantage of a brief spell of quietness on the circuit to post 1:34.328 and 1:34.188 respectively.

Susie Wolff is briefly into P3 with a 1:31.374, but timed laps from others sees her drop down the leaderboard.

Mark Smith: Love this car. Apart from the red Ferrari as a kid this stood out.

Image source, Getty Images

That of course is Jacques Villeneuve's 1999 BAR.

TheBassist: The Red Bull Star Wars livery from '05!

Image source, Getty Images

Image source, McLaren

McLaren:, external Red specs of flow-vis on JB's car help the guys understand aero effects. Matches the livery too.

Image source, Lewis Hamiltom

That's not all Lewis Hamilton has been up to since the last race. He also went to Rome to star in a new film and raced against Sir Stirling Moss at Monza. Oh and did some jet surfing, I didn't even know jet surfing was a thing.

Meanwhile, in the last two weeks, I went to work several times, painted my landing and bought a fridge...

You can read more about a whirlwind couple of weeks for Hamilton in his latest BBC Sport column.

Image source, Getty Images

I've just taken a little trip over to Lewis Hamilton's instagram page, external and, once again, it is enough to make you turn green with envy.

He prepared for the resumption of season by taking in the biggest fight for decades - Floyd Mayeather versus Manny Pacquiao.

Hopefully his own fight with Nico Rosberg will prove a bit more entertaining than the weekend's fight did...

Andrew Benson
Chief F1 writer

"No less an observer than Nigel Mansell said earlier this week that the Spanish Grand Prix was a 'pivotal' race for Nico Rosberg. The 1992 champion, a former rival and team-mate of Nico's father Keke, said that Rosberg 'must start his challenge' here. Rosberg might be 27 points behind Lewis Hamilton and have not out-qualified or out-raced him all season, but he is playing down the size of the mountain he has to climb.

"'It's just a matter of maximising the weekend,' Rosberg said. 'It's not really come together until now. Parts have gone well and other parts not so well and I just need to put it all together and of course I'll try to do that from here onwards.'"

The Mercedes duo of Nico Rosberg and Lewis Hamilton are the first to stick times on the board, the former with a 1:31.039 and Hamilton with a 1:31.205.

Andrew Benson
Chief F1 writer

"Red Bull have had a torrid start to the season, but Daniel Ricciardo is hopeful that some major upgrades for this weekend, which include a new nose, might see them back to something like form. 'I don't want to get too excited but I think this weekend has the potential to put us back in that fight with Williams and get us closer to Ferrari. We have a few aero parts which should help us - these are things we have obviously pushed through as quickly as possible. Obviously everyone else has got some parts but this is the biggest step we should make since Melbourne. On paper the aero gains should put us closer [to the front], but it always depends what the other guys have done. For curing some of the balance issues we've had, these updates sound promising and I have a positive feeling.'

"Of course, Red Bull's biggest problem is the Renault engine, which has taken a backward step in competitiveness this season. And Red Bull cannot hope for much this weekend on that front. 'For now the performance side is not going full steam ahead because of the reliability issues. The main stuff we are trying to resolve this weekend is reliability.'"

Every car has been out on the circuit now, with Daniil Kvyat debuting Red Bull's new short nose concept. His team-mate Daniel Ricciardo is sticking with the old design for now.