Sebastian Vettel back on top in final practice at the Hungarian Grand Prix

After Vettel was unhappy with the car on Friday, Red Bull used its first curfew exception of the year to work into the night trying to improve the set-up.

Vettel then led most of the middle part of the session this morning, having set a 1m22.021s early in the running on harder tyres. Even though he ran wide on his first flying lap on his next outing and took the best out of his tyres, he was still far enough clear of the field that he set a lap that would have been good enough for second next time around.

Alonso was then the first driver to set a good time on the super soft tyres, jumping to the front with a 1m21.469s with 10 minutes to go.

But Vettel's qualifying-style lap was even faster, the world champion clocking a 1m21.168s to end the session on top by 0.301s.

Although Jenson Button took third for McLaren, his team-mate Lewis Hamilton did not get a chance to show what he could do at the end.

The Friday pacesetter ran wide at Turn 1 at the start of what would have been his first flying lap on super softs, reported over the radio that the brakes "did not work" and pitted after one more lap. That left Hamilton in seventh.

Mark Webber was just behind Button in fourth for Red Bull, ahead of Felipe Massa - the Ferrari driving having made some small mistakes on his super soft run. He had earlier narrowly avoided the barriers at the chicane during a trip over the grass.

Nico Rosberg's Mercedes completed the top six, with Hamilton, the second Mercedes of Michael Schumacher, Vitaly Petrov's Renault and Paul di Resta's Force India next up. Nick Heidfeld was just outside the top 10 in the other Renault after losing time parked in the garage with a fuel system problem.

At the tail of the field, the Virgins and Hispanias were all outside the 107 per cent rule cut-off had it been applied to this session - although the leading drivers are unlikely to use super softs in Q1.

Pos  Driver              Team/Car              Time       Gap       Laps
 1.  Sebastian Vettel    Red Bull-Renault      1m21.168s            17
 2.  Fernando Alonso     Ferrari               1m21.469s  + 0.301s  13
 3.  Jenson Button       McLaren-Mercedes      1m21.639s  + 0.471s  14
 4.  Mark Webber         Red Bull-Renault      1m21.645s  + 0.477s  18
 5.  Felipe Massa        Ferrari               1m22.002s  + 0.834s  14
 6.  Nico Rosberg        Mercedes              1m22.534s  + 1.366s  22
 7.  Lewis Hamilton      McLaren-Mercedes      1m22.667s  + 1.499s  14
 8.  Michael Schumacher  Mercedes              1m23.037s  + 1.869s  19
 9.  Vitaly Petrov       Renault               1m23.175s  + 2.007s  19
10.  Paul di Resta       Force India-Mercedes  1m23.276s  + 2.108s  18
11.  Nick Heidfeld       Renault               1m23.281s  + 2.113s  13
12.  Sergio Perez        Sauber-Ferrari        1m23.375s  + 2.207s  18
13.  Kamui Kobayashi     Sauber-Ferrari        1m23.626s  + 2.458s  25
14.  Rubens Barrichello  Williams-Cosworth     1m23.663s  + 2.495s  17
15.  Pastor Maldonado    Williams-Cosworth     1m23.894s  + 2.726s  17
16.  Adrian Sutil        Force India-Mercedes  1m23.966s  + 2.798s  18
17.  Jaime Alguersuari   Toro Rosso-Ferrari    1m23.998s  + 2.830s  15
18.  Sebastien Buemi     Toro Rosso-Ferrari    1m25.061s  + 3.893s  19
19.  Jarno Trulli        Lotus-Renault         1m25.141s  + 3.973s  20
20.  Heikki Kovalainen   Lotus-Renault         1m25.501s  + 4.333s  20
21.  Jerome D'Ambrosio   Virgin-Cosworth       1m26.955s  + 5.787s  20
22.  Daniel Ricciardo    HRT-Cosworth          1m26.991s  + 5.823s  19
23.  Timo Glock          Virgin-Cosworth       1m27.174s  + 6.006s  16
24.  Vitantonio Liuzzi   HRT-Cosworth          1m27.713s  + 6.545s  20

All timing unofficial