Frank Williams has confirmed his team will return to using Cosworth power in 2010, ending months of speculation surrounding Williams' engine supply for next year. Williams last raced with Cosworth in 2006, before the independent manufacturer withdrew from the sport, but is returning in 2010 as part of the FIA's new low-cost vision for the sport. The news means Cosworth will be supplying at least five of the teams on next year's grid.

Despite holding a contract for a Toyota engine supply for 2010, Williams were successfully excused from the agreement as they sought the services of another supplier. Although initial negotiations reportedly took place with Renault and Mercedes, the team eventually opted for Cosworth.

While the Cosworth V8 is currently lacking in power and fuel efficiency, the FIA has allowed the Northampton-based crew to upgrade their engines until mid-2010. F1's other engine manufacturers have not been allowed such a priviledge, and it is hoped the allowance will bring Cosworth closer to its rivals in the power stakes.

Frank Williams revealed the move to Gulf News ahead of this weekend's Abu Dhabi Grand Prix. “We've finished our contract with Toyota and we've moved on to a British engine manufacturer Cosworth with whom we have won many world championships in the past,” said Frank.

“They are 50 miles away from Williams which is very convenient. Besides we also like our independence. We will be not under the influence, not that Toyota ever bossed around, but we've just gone a private and independent route.”

Williams also revealed to Gulf News that he will confirm his driver line-up on Monday, just one day after the season finale at the Yas Marina Circuit. “We will announce our drivers for next season on Monday,” said the 67-year-old. Nico Rosberg has already confirmed this weekend's race will be his last for Williams.

It is widely expected that Williams will confirm GP2 champion Nico Hülkenberg and 2009 title contender Rubens Barrichello as its line-up for next year.