Hamilton sets the pace in opening practice for the Hungarian GP

The McLaren driver outpaced world championship leader Sebastian Vettel by 0.214 seconds with a lap of 1m23.350s, while Fernando Alonso was third fastest for Ferrari.

Mark Webber was fourth, despite a shunt late in the session, ahead of Jenson Button and Felipe Massa in the second Ferrari..

The circuit was dry when the session started but overnight rain had dampened it at the edges, and as ever the Hungaroring was devoid of purchase in these early stages of the grand prix weekend.

Nico Hulkenberg was the first man to gun it, setting a lap of 1m29.671s 20 minutes into the session. That time would be lowered by more than six seconds through the 90 minutes of running. The German, who was standing in for compatriot Adrian Sutil at Force India for the first session, indeed improved on that time on the very next lap to a 1m28.286s.

Just before the half hour mark Sebastien Buemi lowered it again by more than a second (1m27.058s) in the Toro Rosso as he begun the team's 100th grand prix weekend - not counting all those it completed as Minardi.

Button was the first heavy-hitter to file a time, that of 1m25.697s. Not long after that McLaren team-mate and German Grand Prix winner Hamilton joined him on track and immediately went faster with a 1m24.284s. Button then improved to 0.699s behind his team-mate before heading back to the pits as the team evaluated new aero parts and a diffuser.

Ferrari's Massa then went second quickest to split the McLarens, before his team-mate Alonso lapped fastest of all (1m24.179s) having recovered from a small fire early on due to overheating when he returned from the pits after his constant speed run.

It was just about half distance when finally the Red Bulls came out, but Alonso was still working it and lowered his own best time even further to a 1m23.642s

Webber's best at this point was only good enough for second behind the Ferrari.

Vettel meanwhile made steady progress with a fairly long run, which included a lap to back off and a run through the pitlane, which eventually saw him move to the top with a 1m23.564s. The stint also included a locked up moment when he ran across the Turn Five chicane.

With 20 minutes to go the McLarens returned to the action and Hamilton lowered the target time to 1m23.350s, some 0.214s quicker than Vettel had managed.

It was about this time that Webber had a rare shunt, but not before he'd improved to fourth in the times. The Australian went off at Turn Nine, taking off his front wing in the process, having run wide over the kerbs that then pinged him across the track and into the barrier. The car was sufficiently unbroken for him to drive back to the pits however.

After that, most drivers were satisfied to complete their long-run information gathering which ensured that Hamilton ended up fastest from Vettel, Alonso, Webber, Button and Massa. Hamilton himself though was set to improve his own time in the dying minutes, having set purple sectors in the first two, only to be blocked by Jaime Alguersuari. The McLaren man returned the compliment on the next tour.

The Mercedes of Nico Rosberg and Michael Schumacher were split by 0.119s in seventh and eight positions, while Sergio Perez (Sauber) and Vitaly Petrov (Renault) completed the top ten.

Bruno Senna ended the session 15th on his first free practice run for Renault - the Brazilian some 0.7s off the pace of Petrov.

Further down the field, Jarno Trulli, who was projected to use a new power-steering system for this race in a bid to help him get to grips with the Lotus - ended the session 20th, 0.5s off Heikki Kovalainen's time.

Pos  Driver                Team                  Time               Laps
 1.  Lewis Hamilton        McLaren-Mercedes      1m23.350s   	      19
 2.  Sebastian Vettel      Red Bull-Renault      1m23.564s  + 0.214   24
 3.  Fernando Alonso       Ferrari               1m23.642s  + 0.292   29
 4.  Mark Webber           Red Bull-Renault      1m23.666s  + 0.316   12
 5.  Jenson Button         McLaren-Mercedes      1m23.772s  + 0.422   20
 6.  Felipe Massa          Ferrari               1m24.115s  + 0.765   25
 7.  Nico Rosberg          Mercedes              1m24.250s  + 0.900   22
 8.  Michael Schumacher    Mercedes              1m24.369s  + 1.019   20
 9.  Sergio Perez          Sauber-Ferrari        1m24.620s  + 1.270   24
10.  Vitaly Petrov         Renault               1m25.093s  + 1.743   22
11.  Kamui Kobayashi       Sauber-Ferrari        1m25.113s  + 1.763   21
12.  Paul di Resta         Force India-Mercedes  1m25.336s  + 1.986   22
13.  Nico Hulkenberg       Force India-Mercedes  1m25.357s  + 2.007   17
14.  Rubens Barrichello    Williams-Cosworth     1m25.836s  + 2.486   24
15.  Bruno Senna           Renault               1m25.855s  + 2.505   25
16.  Sebastien Buemi       Toro Rosso-Ferrari    1m25.890s  + 2.540   28
17.  Jaime Alguersuari     Toro Rosso-Ferrari    1m26.099s  + 2.749   36
18.  Pastor Maldonado      Williams-Cosworth     1m26.124s  + 2.774   25
19.  Heikki Kovalainen     Lotus-Renault         1m26.878s  + 3.528   26
20.  Jarno Trulli          Lotus-Renault         1m27.352s  + 4.002   21
21.  Timo Glock            Virgin-Cosworth       1m28.533s  + 5.183   30
22.  Jerome D'Ambrosio     Virgin-Cosworth       1m28.903s  + 5.553   22
23.  Tonio Liuzzi          HRT-Cosworth          1m29.059s  + 5.709   24
24.  Daniel Ricciardo      HRT-Cosworth          1m29.904s  + 6.554   26

All Timing Unofficial