A candid Sebastian Vettel has blasted the move to tweak the rules regarding communications once again as part of a wider complaint that F1 cars have become too complicated for the driver to manage.

Following Nico Rosberg's penalty in the British Grand Prix after he was instructed by Mercedes how to manage a gearbox problem late in the race, the FIA has moved to clarify what can be transmitted between team and driver during races.

Amendments include having to pit or retire if a team informs a driver there is a problem with their car, tweaks that Ferrari driver Vettel has branded a 'joke'.

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The four-time world champion has long been cynical towards the current V6 Hybrid era and has repeatedly expressed his frustration that the cars have become too focused on technical complexities, a point he reiterated in Budapest.

"Complete bulls**t," he said. "I think all the radio issues we had, I think it's a joke. I looked at the race after and I found as a spectator it was quite entertaining to hear a driver a little bit panicking on the radio and the team panicking at the same time. I think it puts the element of human being in our sport that arguably is very complicated and technical, so I think that's the wrong way.

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"There's a lot of boring stuff on the radio that got banned, I don't see the point, I think if you want to change it you should change the cars. I have no problem, let's go back to V12s, manual gearbox, two buttons, one for pit speed limiter and one for radio just to confirm when we are coming in and other than that, not much electronics to look after, which there's no point then to memorise a lot of things.

"I think all of the buttons that we have on the steering wheel today are there for a reason. It's not like 'ah yeah, we can build buttons, let's put them on the steering wheel', so I think if you just look at a 1995 steering wheel for example, or speak to a lot of experts that are still around in the paddock, what they raced with, it was a simpler just because the cars technology was a lot simpler.

"It's not our mistake, as in the drivers, that the cars are so complicated these days that they need a manual this big and a steering wheel full of buttons to operate it. I think we're going a little bit in the wrong way so that's why I think it's bad and we should just go back to being able to say what we want."

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