Williams considered engine switch

Williams' third co-owner has admitted the British team considered changing engine suppliers for the 2011 season.

Lotus is set to switch to Renault power at the end of the season, but Cosworth has announced that its other existing partners – Williams, HRT and Virgin – are staying put.

In an interview with Kleine Zeitung newspaper, Austrian Toto Wolff – who has a minority stake in the Frank Williams and Patrick Head co-owned team – admitted there have been disappointments in 2010.