ISTANBUL: Briton Jenson Button extended his lead at the head of the drivers' world championship to more than 20 points yesterday when he cruised to an unexpectedly comfortable victory in the Turkish Grand Prix.

The 29-year-old Englishman, once again revelling in the excellence of his Brawn GP car, clinched his sixth win in seven races this season with a virtually flawless demonstration of smooth and well-judged racing.

He won the race in a time of one hour, 26 minutes and 24.848 seconds, finishing six seconds ahead of second-placed Australian Mark Webber.