Red Bull’s technical genius – Adrian Newey, is understood to have ‘formally submitted’ his letter of resignation to the team.
The move brings an end to an 18-year association between the two sides, including 13 world championships across two periods of dominance.
It’s unknown what sort of challenge the Brit will embark on next, but it has been suggested that he has four teams chasing his signature according to Autosport.
The likes of Ferrari (who are long-term admirers of his work), Aston Martin, McLaren and Mercedes could all afford his services. Aged 65, he could also decide to leave Formula 1 all together, having spent a long time at the pinnacle of motorsport.
It was also reported earlier in the week that Ferrari could offer him a special 'advisory' role, allowing him the chance to work on their projects without having to relocate from England.
The move could also bear massive ramifications for Max Verstappen's future with the team - could he now be swayed away from Red Bull?
Mercedes have already made their stance clear, with the German outfit eager to secure Verstappen's services in the future. Undoubtedly though, Red Bull will put up a fight to keep the three-time F1 world champion if he is indeed entertaining overtures from elsewhere.