Formula One, the season so far...

Jenson Button is on the verge of sealing the drivers' world championship heading into this weekend's Brazilian Grand Prix.

Click here or click the image to launch our guide.

The British driver needs seven points at Interlagos to be certain of glory, with team-mate Rubens Barrichello his nearest rival.

Race-by-race, we take a look at the season so far and analyse how Button finds himself on the verge of the greatest prize in motor racing.