Horner amazed Button still on driver market

Christian Horner has expressed surprise that, two weeks after he clinched the world championship, Jenson Button is still on the market for a team to drive for in 2010.

Horner is boss of the Red Bull team, whose Sebastian Vettel was beaten to the drivers' title by 29-year-old Button last time out in Brazil.

Briton Button and Brawn are at odds over the size of his retainer for next year, which has reportedly sparked the interest of the McLaren team.

McLaren was earlier thought keen to snap up the available Kimi Raikkonen, but the Finn's asking price is at least double the amount Button is demanding from his reluctant Brawn chiefs.

"I just find it staggering he's won the world championship and had a brilliant year and he hasn't been signed up for next year," Horner told BBC television on Friday when asked about Button's contract standoff.

"If I was Brawn, I'd get off the fence pretty quickly because he's a pretty attractive proposition. I wouldn't hang about too long if I were them," he added.