For the fifth year running, Atlas F1 is going to keep an eye on the battle between teammates throughout the season with a simple measurement: we compare the qualifying times of each driver against his teammate's result. After every Grand Prix, we will show how teammates have fared up against each other, and where they are overall since the beginning of the season. At the end of the season, the World Champion of Qualifying Differentials will be elected - the driver who beat his teammate by the most seconds. Only those who participate in at least 15 of the 17 rounds are eligible for the coveted crown; and for those who made the efforts and participated in all 17 races, the best and worst result will be scrapped.

With ten qualifying sessions completed for 2002, the differentials are once again on a roll! Let's see which drivers deserve bragging rights.

Britain Notables

• Yoong/Webber: While there's no surprise in the fact that Mark Webber yet again outqualified his Minardi teammate Alex Yoong, it's worth noting that the Silverstone qualifying differential between the two is the biggest gap of the year - 2.504 seconds.

• Setting the Record Straight: Mika Salo's eighth was Toyota's best qualifying position ever, while Jordan's Takuma Sato equalled his previous best grid position, with 14th.

• The excuses: Pedro de la Rosa had only one flying lap to set his time, while Giancarlo Fisichella and Jenson Button had to use the spare car.

• Changes since Europe: Kimi Raikkonen is now faster than David Coulthard, and Juan Pablo Montoya is faster than Ralf Schumacher.