Race day at Silverstone began dry and bright - and with Jorge Lorenzo leading the morning warm-up for the British MotoGP.

Temperatures were still cool (air 15-degrees), and the ever present wind on the former airfield continues to torment the riders, whilst ushering in a constant stream of clouds across the otherwise blue sky.

That in turn means the threat of rain is never far away.

Fourth in Saturday's rain-interrupted qualifying, 2012 title leader Lorenzo led his first track session of the weekend by lapping 0.219s ahead of Ducati's Nicky Hayden on the fourth of his ten laps. Hayden will start seventh after a fall in the closing stages of qualifying.

Honda's world champion Casey Stoner lapped 0.290s from the front in third, where he will start the race.

Yamaha riders Ben Spies (Factory) and Andrea Dovizioso (Tech 3) were fourth and fifth this morning, while debut pole sitter Alvaro Bautista set the sixth best time for Gresini Honda (+0.766s).

Hector Barbera (Pramac) and Stefan Bradl (LCR) were the final riders within a second of Lorenzo, with Hayden's team-mate Valentino Rossi left in ninth place - but almost one-second under his qualifying time.

Just 0.3s behind Rossi and 1.3s from Lorenzo was the returning Cal Crutchlow, cheered all around the circuit by the British fans.

The Yamaha Tech 3 rider missed qualifying for his home round after injuring his ankle in a Saturday morning fall.

The team reported that hospital scans failed to find any fractures, and Crutchlow passed a medical check this morning, but the Englishman himself says he has "a broken and dislocated left ankle".

Crutchlow, who missed last year's British race due to a broken collarbone in qualifying, went steadily faster as the session went on, eventually setting the tenth best lap out of the 20 riders - ahead of Repsol Honda's Dani Pedrosa.

Crutchlow's best lap time, of 2m 4.999s, would have put him ninth on the grid in qualifying. Instead, Crutchlow will start last, but clearly has the potential to beat the CRTs at the very least, which would mean eleventh or better.

While Crutchlow rebuilt his confidence, countryman James Ellison suffered a highside from his PBM Aprilia at the end of the session and limped away with the help of marshals.

Fellow Aprilia CRT rider Mattia Pasini didn't register a lap after problems with both bikes - a possible fall with the first and then a suspected technical issue with the second.

Behind Pedrosa, Aleix Espargaro got the better of Aspar Aprilia team-mate Randy de Puniet by 0.150s to be the leading CRT.

Cardion AB Ducati's Karel Abraham is unfit to ride this weekend due to finger fractures in his left hand sustained in testing at Aragon.

Silverstone is the first event where the new specification Bridgestone slick front tyre becomes the only construction available.

Lorenzo (3) and Stoner (2) are the only riders to win races so far this year and also the only riders to win at Silverstone since the circuit rejoined the MotoGP calendar in 2010.

Due to the time difference with Europe, the race day schedule will start with Moto2, followed by MotoGP and then end with Moto3.

Warm-up:

1. Jorge Lorenzo
2. Nicky Hayden
3. Casey Stoner
4. Ben Spies
5. Andrea Dovizioso
6. Alvaro Bautista
7. Hector Barbera
8. Stefan Bradl
9. Valentino Rossi
10. Cal Crutchlow
11. Dani Pedrosa
12. Aleix Espargaro
13. Randy De Puniet
14. Michele Pirro
15. Yonny Hernandez
16. James Ellison
17. Colin Edwards
18. Danilo Petrucci
19. Ivan Silva
20. Mattia Pasini