Uncertainty over rule changes and exemptions concerning the use of off-throttle blown diffusers dominated off-track discussion at the British Grand Prix, though consensus within the media was that the issue did not directly affect the sport. Mark Webber started from pole position in the race; however, Sebastian Vettel took the lead on the first lap. A mistake from Red Bull Racing in the pits allowed Fernando Alonso to take control of the race, which he went on to win by sixteen seconds, his first victory since the 2010 Korean Grand Prix. Webber caught Vettel in the dying stages of the race, but was given a late team order to maintain his position, and the Australian finished third behind his teammate. Felipe Massa was similarly catching Lewis Hamilton, whose progress had been hampered by an order to conserve fuel, for fourth position and the two made contact in the penultimate corner on the last lap, forcing Massa to run wide over the finish line. Jenson Button fell from second to fifth place in the championship when a wheel nut was improperly attached to his car during his final stop, forcing his retirement from the race.