Breaking: FIA confirm decision on McLaren rear wing

McLaren has been told by the FIA that it must modify its flexing rear wing that caused a stir after the Azerbaijan Grand Prix.

RacingNews365 can confirm that the rear wing has not been deemed illegal by the sport's governing body - however the team must implement adjustments to control how much the element moves.

Onboard footage of Oscar Piastri's rear wing was brought to light after the Australian fended off Charles Leclerc for victory around the Baku City Circuit last weekend.

A gap appeared in the rear wing at high speed, supposedly giving Piastri a straight-line speed boost.

McLaren has been adamant that the rear wing falls within the confines of the regulations, with questions asked by rival teams.

The scrutiny was raised shortly after McLaren and rivals Mercedes had their flexing front wings probed, with the FIA confirming no issues on that front.

Speaking in Singapore, McLaren CEO Zak Brown defended the rear wing configuration and praised the Woking-based squad's engineering team.

“It passed every single test,” Brown told Sky Sports F1. “I think this is Formula 1, it's clever engineering. The FIA is fine with it. So it's business as usual.”

The FIA confirmed on the build-up to the Singapore Grand Prix that it could look to change the technical regulations if it was unhappy with any elements on the cars across the grid.

While McLaren has not been judged to have breached the regulations, it must now make changes to decrease how much rear wing movement occurs.

RacingNews365 has approached McLaren for comment.