BAR boss backs Button

"The difference between Jenson now and Jenson two years ago is dramatic," said Fry. "Now he is very conscious that he has a role in leading the team as well as driving the car. That is what world champions do and that is what Michael Schumacher does.

"We have to beat Michael and Ferrari. A lot of credit goes to Michael, but he is a true team leader."

Earlier in his Formula 1 career, notably during his Benetton/Renault years, Button was criticised for a perceived lack of commitment and maturity, but his breakthrough 2004 season erased almost all doubts about his focus and approach. With the experienced Jacques Villeneuve replaced by Takuma Sato in the second BAR, Button was required to step up and become an indisputable F1 team leader for the first time. He rose to the challenge with a string of podium finishes - despite the controversy surrounding his attempt to move to Williams.

Fry says that Button is now fully aware of what he needs to do away from the racetrack in order to challenge for the championship, and that this will be apparent in 2005.

"He realises it is tough and that there is a lot to do," said Fry. "Driving is one tenth of what you have to do. You don't become world champion that easily, otherwise everyone would.

"Jenson knows he cannot become champion by relaxing, but by thinking about motor racing every day of the year."