Lewis Hamilton's Silverstone win unlikely without red flag - Mercedes engineering director

Hamilton: Verstappen cut across me (0:39)

Lewis Hamilton defends his involvement in the incident that saw Max Verstappen crash out of the British GP on the first lap. (0:39)

Lewis Hamilton might not have won his home British Grand Prix on Sunday without the race being halted after he and Red Bull's Max Verstappen collided on the opening lap, according to Mercedes trackside engineering director Andrew Shovlin.

The seven-times world champion won his home race for the eighth time, slashing Verstappen's overall lead in the championship from 33 points to eight.

Verstappen crashed out at speed, with the damage to the tyre wall requiring a lengthy pause.

The red flag period allowed Mercedes to inspect Hamilton's car closely and detect potential damage to the front left wheel rim that had not otherwise been obvious.

"That would have been a DNF (did not finish) had it [the race] not been red-flagged," said Shovlin in post-race comments.

A Mercedes spokesman clarified however that subsequent checks at the factory showed the rim failure was less conclusive.

Hamilton was handed a 10-second penalty for the collision but raced back to seize the lead from Ferrari's Charles Leclerc with two laps to go and win the race.

Shovlin said Hamilton's radio comments reflected the situation.

"You can hear it in his voice and in what he's saying on the radio; you just get this switch where he knows in his head he's going to do it today," he added.

"To be honest, it was really nice sitting on the pit wall just watching that final stint unfold, because it was a great win and a well-deserved win for Lewis."