McLaren racing director Eric Boullier admits it has been surprised by a technical directive from the FIA that interconnected suspension systems could be banned.

Charlie Whiting sent a technical directive to all the teams explaining that front and rear interconnected suspension [FRIC] systems are likely to be considered illegal by the FIA and banned in future. While there is uncertainty over the timing of any ban - with the FIA willing to delay until 2015 but teams having to unanimously agree - Boullier said the directive itself had not been expected.

"It came as a surprise," Boullier said. "It's obviously not come from any team action it is an FIA action. We had been warned over the weekend that something could come out of this. Obviously we got this technical directive from Charlie Whiting.

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"I think all of the teams on the grid have this kind of suspension system which is connecting a little bit the different [ends] to better use the dynamics of the vehicle. I think some teams might have been extreme, which is maybe why the FIA is questioning the legality of this system.

However, Boullier doesn't expect McLaren to be disadvantaged by any potential ban if it comes in to force this season.

"In the case of McLaren we are quite relaxed to be honest. So we don't see any issue with that for us. I don't think there will be too many disturbances for the rest of the season. Even if we don't like any technical or sporting changes during the season but there is maybe some reason behind why the FIA wants to do it."

With Mercedes believed to have the most sophisticated FRIC system, Boullier said some teams could suffer heavily.

"I don't know the secrets of designs of the other teams; I think in most of the teams it would not be a game-changer. There is maybe a couple of teams who have been extreme and who could potentially be in trouble to switch back to a non-connected system."

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richard - Chapman thought differently...but irrespective of why such systems were originally introduced, if they tend to produce the desired result, why wouldn't they be used now?

I realise that richard, however surely controlling pitching is a fundamental part of a stable aero platform - which was why Chapman initially designed the 72 to have both (although Rindt complained that the "feel" of the car was missing, so the suspension was re-designed).

So cue anti-dive and anti-squat suspension designs.