There was a flurry of lap times being set at the end of the session .
It was not certain which drivers had made it through until after the chequered flag was waved as every driver but Vettel , Webber and Hamilton came back on track .
There was a flurry of lap times being set at the end of the session , and it was not certain which drivers had made it through until after the chequered flag was waved as every driver but Vettel , Webber and Hamilton came back on track .