Kevin Magnussen is not wrong, you know. It is minus 0.3C out on the track.

Fancy seeing a fancy video with all you need to know about yesterday and today. Of course you do. Luckily, the official Formula 1 Twitter page has just posted this snazzy video.

BBC Sport app users may need to click on the link to see the video.

We have some action. Kevin Magnussen in his Haas trundles out for an early look at the track. Thirteen drivers set times yesterday, he was not one of them.

He is no stranger to the cold conditions, but the Dane is already saying it is a bit chilly.

BBC Sport app users may need to click on the links to see the tweets.

Andrew Benson
BBC Sport’s chief F1 writer

Pre-season testing is often a slow-burner, the secrets of the new season revealed slowly. This year will be no different - analysing the results made even more difficult by the unusually cold weather in Barcelona on Monday and for the next couple of days.

Even so, the final classification after the first day of 2018 running had a familiar look to it - a Red Bull followed by a Mercedes and a Ferrari. No one in the paddock - with perhaps the exception of Fernando Alonso - thinks it will be any other than those three teams as the main contenders this year.

Image source, Getty Images

Ben Southgate: Can’t wait for this season what about Hamilton vs Vettel vs Verstappen vs Alonso?

Yes, Ben, good lad. That's what we like, some early morning optimism. As Andrew has said, Alonso getting up close and personal with the gravel made the headlines but he had some good pace as well and his McLaren ended the day seventh quickest.

The Spaniard only had five points finishes last season, but three of those were in the final three races of the season. Mercedes vs Ferrari vs Red Bull vs McLaren. Let's hope so.

Image source, Reuters

Andrew Benson
BBC Sport’s chief F1 writer

The big story of the first day was defined early on, when Fernando Alonso’s McLaren ended up in the gravel at the last corner having lost a rear wheel. The whole watching media knew that was a good story - and it turns out so did Alonso himself. What did he think when it happened? “That it was a good day for you guys,” he replied with a smile.

“I thought exactly that because this is a very, very small problem, but very graphic, very obvious. A car in the gravel makes a big thing, but there are six teams in the garage with the door closed, with the car in pieces - but there is no picture of that. So there are a lot of teams in trouble, big trouble, and for us with a wheel nut it will make the thing of the day. So I thought about all of you.”

Alonso, who was fifth fastest initially but was demoted to seventh when it was confirmed he had cut the chicane on his quickest lap, insisted that it did not affect McLaren too much because they “didn’t plan to run in the morning much, we were on a different programme (and) we had a normal day in the afternoon, I’m the one who did the most laps in the afternoon.”

Be that as it may, it meant he ran when conditions were at their worst. But overall, he said: “It’s a very good start. The car felt very good here, good potential. The performance side it is very early to say but everything seems to be in line with our expectations and the wind tunnel and the data we had before coming to the team. So everything is quite optimistic.”

Image source, Reuters

McLaren had a difficult start to Formula 1 pre-season testing when Fernando Alonso's car lost a wheel after just six laps in Spain.

The two-time champion lost control at the last corner of Barcelona's Circuit de Catalunya when his right rear wheel came off.

Red Bull's Daniel Ricciardo set the fastest time ahead of Mercedes' Valtteri Bottas. Alonso and McLaren recovered to set the seventh fastest time of the day.

McLaren blamed a "wheel nut issue" and Alonso lost valuable running in the best conditions.

Alonso was initially classified fifth but was demoted to seventh when it was confirmed he had cut the chicane on his fastest lap to ensure he was not delayed by Toro Rosso's Brendon Hartley.

Image source, AFP

Just like the pit lane at the moment, it will be a pretty lonely place without anyone else and I don't want to be rambling on to myself all day so please do get involved.

Send us your thoughts, observations, jokes and pictures via the hashtag #bbcf1 and we will post those messages in this page throughout the day.

New season, new hope. Maybe. Let's start off with hopes and expectations.

What do you hope to see today / this season and what do you expect to see today / this season?

Go, go, go.

And the world champions have said that Valtteri Bottas will be hitting the track first, with Lewis Hamilton running this afternoon.

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Well, Mercedes are ready. Even if nobody else is.

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First up, a quick weather update.

And it not just in Great Britain where you are waking up today and seeing the snow.

We have had some snow at the Circuit de Catalunya overnight, but a tweet from the circuit says we're still good to go today.

BBC Sport app users may need to click on the link to see the tweet.

Morning. Hope you are all well. Thanks for joining us for the second day of testing from the Circuit de Catalunya in Barcelona.

I'm Michael Emons and I will be guiding you through the action, the fast times, the crawlers and the spinners.

After a pretty miserable 2017 campaign, Fernando Alonso was probably really excited about the new season.

Six laps into the first day of testing and this happened...

It was not all bad for the Spaniard as he later posted the seventh fastest time on day one, but no-one could go quicker than the Red Bull of Daniel Ricciardo, who was the quickest out in Spain.

Image source, AFP

What will happen today? Let's find out.