Marussia unveil 2012 challenger at Silverstone

Marussia's new MR01 made its on-track debut at the UK's Silverstone circuit on Monday. The team were forced to postpone the launch of their 2012 car - and miss the final pre-season test in Barcelona last week - after it failed to pass its final mandatory FIA crash test. Â"We are very pleased to be running the new MR01 for the first time this morning,Â" said team principal John Booth. Â"It has been a long and frustrating wait for everyone in the team but we can now get back on track - literally - and start working towards the first race of the season in Australia next weekend.Â"