Button can be champion, says Stewart

"Jenson has got the keys to the door now," the Scot, three times a world champion, told reporters.

"Even though he may not win the next race, people cannot say that Jenson flopped again. It doesn't work like that, but I believe he can go on and win many more
times now if he has got the car.

"Jenson can go on to be world champion. He has the talent to do that.

"But you can't start a season saying I am going to be world champion. You  have
got to build to it by winning races and finishing on the podium as much as
possible.

"It is up to Jenson now, he has to build from here."

Button was the first Briton to win a Grand Prix since David Coulthard in 2003 and the first Englishman since Johnny Herbert in 1999.

Neither Coulthard nor Herbert went on to win the championship. Damon Hill, who took his first victory in Hungary in 1993, remains the last British world champion in 1996.

Hill warned Button that he might face a long wait for another success.

"I believe that Honda still has some more work to do before we can regard the team as having consistently winning equipment," he told the Guardian newspaper.

"Jenson's win was very much a wild-card success in unusual circumstances and it's my feeling that when it comes to the next race in Istanbul, it will be back to situation normal, with the team reverting to their role as a championship pretender rather than established front runners."