Northern Irish racer Carroll didn’t compete final 12 months owing to the pandemic, however will contest the GT Cup in 2021 alongside Oliver Webb in a McLaren 570S GT4 for brand new squad Greystone GT.
The 2009 A1 GP champion will journey with NIO 333 for the opening double-header spherical of the brand new marketing campaign in Saudi Arabia and be on standby to exchange Oliver Turvey and new signing Tom Blomqvist.
Along with a one-off outing within the mothballed Jaguar i-Tempo eTrophy competitors, Carroll competed for the works Jaguar FE workforce when it made its championship debut in 2016-17.
A hasty entry and powertrain construct to exchange the workforce of ex-Components 1 driver Jarno Trulli meant Jaguar completed final of the ten groups that season.
Carroll scored two factors, ending seven locations behind teammate Mitch Evans, earlier than being dropped in favour of inaugural FE champion Nelson Piquet Jr.
The ex-BAR Honda F1 check driver has undertaken simulator runs of the Diriyah circuit at NIO 333’s Oxfordshire base.
Carroll mentioned: “I’m very comfortable to be becoming a member of NIO 333 FE workforce as reserve driver. Components E is an enchanting championship to work in; this can be very excessive stage and technically complicated.
“It has been attention-grabbing to see how the vehicles and methods have developed since I raced with the sequence in 2017 and the NIO 333 workforce is pushing very arduous for the approaching season.
“I stay up for the problem forward.”
NIO 333 has completed backside of the groups’ standings for the previous two years in FE however enters 2021 with a brand new powertrain after a placeholder marketing campaign following its buyout by Lisheng Racing on the eve of final season
Group principal Christian Silk added: “Not solely is Adam a really proficient racing driver, however he’s additionally an excellent good friend of the workforce.
“The position of reserve driver is clearly essential to us and I’m very grateful that we now have such a protected pair of arms on this key place.
“I’m certain I communicate for the entire workforce once I say we’re wanting ahead to working with Adam once more.”