Roberts leads Rossi in wet Donington warm-up.

Kenny Roberts has confirmed his wet weather potential on the Bridgestone shod Suzuki by leading this morning's warm-up session ahead of the British Grand Prix at Donington Park.

Amazingly, there were no fallers in the session, which concluded with Roberts - who led in the wet at Shanghai before mechanical problems - holding a narrow 0.254secs advantage over world champion, and this afternoon's pole sitter, Valentino Rossi.

Marco Melandri - who was third behind Rossi and Olivier Jacque at the Chinese GP - was third fastest this morning, with Ducati's Carlos Checa just a fraction behind the Movistar Honda rider and within 0.351secs of Roberts.

The second Ducati of Loris Capirossi took fifth, 0.874secs from the top, while Repsol Honda's Max Biaggi lapped a further half a second slower to secure a morning sixth in front of Bayliss, Barros, Gibernau and Hayden.

Roberts' best time was 16.051secs from Rossi's pole pace, but the first signs of a dry line did start to develop. However, the outlook remains gloomy and few would predict that the track will dry fully - or that further rain won't fall - before the MotoGP race starts in just under five hours (at 15.30 local time).

Full times to follow...

Warm-up:

1. Roberts
2. Rossi
3. Melandri
4. Checa
5. Capirossi
6. Biaggi
7. Bayliss
8. Barros
9. Gibernau
10. Hayden
11. Hofmann
12. Hopkins
13. Edwards
14. Elias
15. Nakano
16. Byrne
17. Tamada
18. Xaus
19. Battaini
20. Ellison
21. Rolfo