In 2021, Aitken raced in a number of Formula 2 rounds for HWA Racelab alongside his GT commitments.

In July, Aitken was taken to hospital with non-life-threatening injuries after being involved in a horrific multi-car shunt at Raidillon during the early stages of the Spa 24 Hours race.

Aitken broke his collarbone and fractured vertebrae but has recovered well since. 

The 26-year-old made his competitive return to racing at GT World Challenge’s 2021 season finale at the Circuit de Barcelona-Catalunya, where he finished sixth.

Aitken will drive for Williams in FP1 at F1’s season finale at the Yas Marina Circuit in December.

Williams announced on Twitter: “We're pleased to confirm that official reserve Driver Jack Aitken will run the FW43B for FP1 in Abu Dhabi!”

Aitken wrote on his own Twitter account: “Did I sneak in to check if she still fits? Maybe. Pumped to say I’ll be taking part in FP1 in Abu Dhabi with Williams once again, looking forward to closing this year out the right way.”