Jenson Button says hot-headed Frenchman Romain Grosjean is entirely to blame for their collision during the Hungarian Grand Prix.

Grosjean, of Lotus, collided with Button’s McLaren during a badly-judged bid to pass him on the 24th lap of Sunday’s race in which he was penalised for another incident and ended up finishing sixth.

Button was seventh.

In their collision, it appeared that Grosjean tried to follow Sebastian Vettel in overtaking the McLaren, but misjudged the space available and required.

The stewards swiftly announced an inquiry into the incident, which was continuing after the race.

Button said: “I’m going to see the stewards about it, but I think it’s pretty straightforward – I couldn’t go any more left.

“That’s it, really. Unless I’m on the grass, which is not where I want to be when I’m braking for a corner, he had no way of not hitting me.

“I obviously didn’t realise how narrow the circuit was at that corner…

“It could have been a lot worse than it was. It could have ended both of our races.

“I was quite lucky. I think our cars are robust.”

Button added that he could foresee the incident, but was powerless.