Williams called off its car shakedown of Thursday due to poor weather conditions, the team has confirmed to GPUpdate.net. Valtteri Bottas had travelled to Spain for the run.

Indian driver Narain Karthikeyan joins Pedro de la Rosa at HRT for the 2012 season.

After spending the last few seasons playing catch-up to Red Bull and McLaren, Ferrari were under pressure to pull something special out of the bag for 2012. And after revolutionising the way they approach the design of their cars, the Italian team are certain the newly-launched F2012 is capable of returning them to their championship-winning heydays. The Scuderia endured a miserable 2011, winning just one race and finishing the year 275 points behind eventual champions Red Bull and 122 behind long-time rivals McLaren. After much reflection, Ferrari decided their recent disappointments had been largely caused by their too-conventional design approach and have opted to be much more aggressive this year.

Force India unveil the new Formula 1 car in which Scotland's Paul di Resta will compete in 2012.

Sharing the media spotlight with Ferrari, Force India unveiled their 2012 car in the pit lane at Silverstone on Friday morning. The team, who are based just down the road from the UK track, hope the VJM05 will prove quick enough to push them firmly into the midfield following their excellent progress in 2011, which saw them take sixth in the constructors' standings. The Mercedes-engined car boasts heavily revised sidepods and a stepped nose, in line with this year's regulation changes. It will be raced by Scotland's Paul di Resta and Germany's Nico Hulkenberg, who were both in attendance at the launch, alongside third driver Jules Bianchi.

Ferrari unveil their 2012 Formula 1 car, saying they have a "responsibility" to win from the start of the season.

Force India has unveiled its 2012 contender, the VJM05, which, like the Ferrari F2012, can hardly be described as pretty.

After being forced to cancel their planned launch ceremony due to snow, Ferrari presented their 2012 car to the world via the internet on Friday. The F2012 will make its testing debut at Jerez in Spain next week. As predicted, the Scuderia's new machine uses a stepped-nose design to meet new regulations on front chassis height and practically every area of the car has been fundamentally revised from its 2011 predecessor.

As Ferrari released images of its car on the internet, Force India removed the covers from its own new F1 contender at Silverstone. The unveiling was conducted by drivers Paul di Resta and Nico Hülkenberg with the VJM05, like the new Ferrari, featuring a dramatic descent in its nose cone as regulations change for the 2012 campaign.

Ferrari has unveiled the F2012, the car with which it will contest the 2012 Formula One World Championship.