Button kicks off test for Benetton.

The Benetton-Renault team started today their first of four days testing in Magny Cours, France with Jenson Button behind the wheel. The team is testing under very warm conditions alongside eight other Formula One teams.

Mike Gascoyne - Benetton's Technical Director - said: "We had a productive first day testing at the circuit Magny-Cours doing basic chassis balance work in preparation for the Grand Prix that will take place here on the 1st July."

"Jenson (Button) also carried out some brake development in preparation for the Canadian Grand Prix and an assessment of the front tyre comparisons. All in all we got some good answers so we had a productive day testing. Tomorrow we will be concentrating on a Michelin tyre programme in preparation for the Magny-Cours race."

Leading times: Magny-Cours - day one:

1. Ralf Schumacher Williams-BMW 1m 15.108s 56 laps
2. Alexander Wurz McLaren-Mercedes 1m 15.366s 89 laps
3. Pedro de La Rosa Jaguar-Cosworth 1m 15.441s 77 laps
4. Rubens Barrichello Ferrari 1m 15.448s 78 laps
5. Eddie Irvine Jaguar-Cosworth 1m 15.585s 42 laps
6. Ricardo Zonta Jordan-Honda 1m 16.388s 54 laps
7. Jarno Trulli Jordan-Honda 1m 16.520s 75 laps
8. Jacques Villeneuve BAR-Honda 1m 16.567s 44 laps
9. Michael Schumacher Ferrari 1m 16.681 7 laps

10. Jenson Button Benetton-Renault 1m 16.880s 25 laps

11. Patrick LeMarie BAR-Honda 1m 16.891s 56 laps
12. Luciano Burti Prost-Acer 1m 16.995s 43 laps
13. Enrique Bernoldi Arrows-Asiatech 1m 17.010s 52 laps
14. Jos Verstappen Arrows-Asiatech 1m 17.217s 45 laps

Track conditions / weather: Dry, sunny and hot.