Williams' head of vehicle performance Rob Smedley says closed cockpits would be "very easy to implement" if F1 wanted to do so.

Jules Bianchi suffered a severe head injury as a result of his car going under a recovery vehicle during the Japanese Grand Prix. The FIA has been working on closed cockpit technology for some time and, while Smedley says he doesn't know if it would have helped in Bianchi's accident, he believes that it would not be a big challenge from a design point of view to switch to closed cockpits in future.

"From a technical point of view it's something very easy to implement," Smedley said. "It would change the look of Formula One cars, which I guess there is an aesthetic argument for. They are open-wheel, open-cockpit racing cars.

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"Does it change the formula a little bit? I think if you look at how a Formula One car looks in 2014 compared to how it looks in 1950 when the championship started, they don't look very similar to be perfectly honest. So whether or not the aesthetics is an argument or not ... it's certainly not one for me. Maybe for other people."

When it was put to Smedey that visibility could be an issue - especially in poor weather - he said LMP1 cars had shown that not to be the case.

"There's cars that do 24 hours in Le Mans in the dark and I've been to quite a few races there where it's rained quite heavily. I'm sure the very clever people who design those cars have got round that problem [of visibility]. Again, I don't think that's a really strong argument."

And Smedley said the issue of closed cockpits has been discussed for the last five years and continues to be analysed.

"It's something that we've looked at in lots of the Technical Working Group meetings. It's something that has all come about from 2009 when Felipe had his accident. It's something that we've looked at, it's something that we've been back and forward with. It's not a closed [topic]."