( CNN ) -- Heikki Kovalainen prevented practice for the inaugural Abu Dhabi Grand Prix from being an all-British affair as he topped the timesheets after the second session . With three minutes of the session remaining , and with Lewis Hamilton poised to edge out Jenson Button at the top of the standings , Kovalainen ensured it would be a McLaren one-two rather than a British one-two that led the way ahead of Sunday 's race . Conditions for the second 90-minute period were markedly different to those in the first as outgoing world champion Hamilton pipped new title-holder Button by just 0.096 seconds . Earlier , as the drivers acclimatised themselves to the new Yas Marina circuit , they basked in temperatures of 35 degrees Celsius . It was still 31 degrees when the second session began at 5pm local time , but on this occasion the following 90 minutes would be played out under a setting sun for the first time in F1 history , and ultimately floodlights as day shifted into night . Ultimately , it was Finn Kovalainen who led the way with a time of one minute 41.307seconds , over 2.5 seconds quicker than Hamilton 's best earlier in the day . But that was no surprise as the 20 drivers grew accustomed to the track , culminating in the Finn ending up quicker than his McLaren team-mate by just 0.197 seconds , with Brawn GP 's Button 0.234 seconds down on Kovalainen . Sebastian Vettel , looking for a small degree of consolation for the year by finishing second to Button in the championship , was fourth quickest in his Red Bull , 0.284 seconds behind Kovalainen . Toyota 's Kamui Kobayashi , who is deputising for the injured Timo Glock , was fifth , followed by Toro Rosso 's Sebastien Buemi and Red Bull 's Mark Webber , winner in Brazil last time out . The top 10 was completed by Brawn 's Rubens Barrichello , who himself has designs on finishing runner-up to his team-mate , with Williams ' Nico Rosberg ninth and Kimi Raikkonen in his Ferrari 10th . BMW Sauber 's Robert Kubica finished bottom of the timesheets , but that came after blowing an engine after 13 laps . That is likely to incur a 10-place grid penalty for the race as he has already used the permissible eight engines for the season . Meanwhile , the Williams team have confirmed Cosworth will be their new engine supplier from next season . After recently ending their contract with Toyota ahead of schedule , the news is unsurprising as Williams have long been touted to again join forces with Cosworth after previously working with them in 2006 . Team principal Frank Williams told reporters : `` Cosworth have impressed us with the quality of their technical team and convinced us their program will deliver a competitive Formula One engine . `` In addition , like Williams , Cosworth is an independent company whose owners share our passion for racing and engineering . `` We believe that , working together , we will develop not only a competitive racing car for 2010 , but also a long-term partnership that can take on the best in Formula One . ''
Williams tops timesheets in practice for Kovalainen . Kovalainen edges out Lewis Hamilton and world champion Lewis Hamilton . Jenson Button team have confirmed Yas Marina will be their new engine supplier .