Jenson Button Q&A: We have a good base to work on

Following this week’s Valencia test, all the drivers were modest in their praise of their new cars. All you hear is that their 2010 machine ‘feels positive’ or ‘feels good’; certainly nobody is willing to stick their neck out and state that their car is a potential race winner, as Jenson Button did last year about his eventual title-winning Brawn.

This season, however, the reigning world champion is more cautious as he reviews his first ride in McLaren’s MP4-25…