Current championship leader Jenson Button showed that Brawn GP could be the team to beat again in Barcelona after topping the opening practice session for the Spanish Grand Prix at Catalunya.
Toyota's Jarno Trulli had looked set to lead the way in the opening session of the European Formula One season with a time of 1min 22.154secs before Button became the only man to dip below the 1min 22sec marker in the dying seconds of the session – lapping more than three-tenths of a second quicker than anyone else.
Button wasn't the only late mover during the session, as both Robert Kubica and Nick Heidfeld left it to the final moments of practice to move up to third and fourth place to give encouragement to the BMW Sauber team ahead of the weekend, with the two cars running without KERS this weekend.
Kazuki Nakajima and Nico ROsberg took fifth and sixth for Williams – the latter despite a spin at turn 14 – ahead of the under-pressure Nelson Piquet was seventh for Renault. Timo Glock took eighth in the second Toyota despite going off at turn four through the gravel.
Felipe Massa in the leading Ferrari and Rubens Barrichello's Brawn rounded out the top ten.
Elsewhere, Kimi Raikkonen was eleventh for Ferrari just ahead of Red Bull pair Mark Webber and Sebastian Vettel while defending champion Lewis Hamilton was the lead McLaren down in 14th place. Team-mate Heikki Kovalainen was back in 19th place, two positions behind former McLaren man Fernando Alonso who was well down the times ahead of his home event.
In another tight session, less than 1.8secs covered quickest man Button down to Adrian Sutil – who went off twice during the session and posted the 20th quickest time as a result.
To view times from first practice, CLICK HERE