McLaren was embroiled in controversy over the Singapore Grand Prix weekend when Red Bull and Ferrari protested their rear wing design. The ‘Mini DRS’ was spotted in the aftermath of Oscar Piastri’s win at the Azerbaijan GP, whereby onboard footage of the rear of his car showed the upper flap of his DRS opening without being activated in the usual manner. Instead, it pivoted upwards when at speed which enabled Piastri to dump extra drag on the straights while defending from Charles Leclerc. The FIA investigated the design on the Friday of the Singapore GP at the request of Red Bull and Ferrari,…