The FIA intervenes following intense scrutiny of McLaren's controversial rear wing design, which rival teams claim breaches aerodynamic regulations.

F1’s regulations limit the amount of flexibility permitted, but teams try to find ways to maximize this to improve performance.

SINGAPORE (Reuters) -Formula One leaders McLaren will modify the rear wings on their cars after talks with the governing FIA at the Singapore Grand Prix following concern from rival teams. The British-based team went top of the standings in Azerbaijan last weekend but drew scrutiny of how the rear wing functioned at speed,