Alex began his single-seater career in Formula Renault UK, dominating the 2011 championship with a record 12 wins from 20 race starts. He was subsequently named British Club Driver of the Year at the 2011 Autosport Awards.
Alex moved up to British F3 the following year and finished fourth before progressing to the prestigious FIA European F3 Championship in 2013 where he claimed third in the standings as the highest placed rookie. Alex ended the season with a dominant victory in the coveted Macau F3 Grand Prix.
In 2014, Alex wrapped up the GP3 title with a record points margin, also becoming the first Englishman to claim this title.
As well as his Development Driver duties for Williams Martini Racing in 2016, Alex also competed in GP2 Series for the championship-winning DAMS racing team for a second year.
At the end of 2017 Alex joined DS Virgin Racing as a driver in the FIA Formula E Championship and also became an Aston Martin Racing factory driver in their World Endurance Championship programme. He continued in Formula E with Jaguar Racing for part of the 2018/19 season while continuing his sportscar racing in WEC.
ABB FIA Formula E Championship / Mahindra Racing, FIA World Endurance Championship
ABB FIA Formula E Championship / Jaguar Racing, FIA World Endurance Championship, Blancpain GT Series Endurance Cup
ABB FIA Formula E Championship / DS Virgin Racing and Jaguar Racing, FIA World Endurance Championship
Sebring 12 Hours (winners), FIA World Endurance Championship
GP2 Series (6th with 3 wins), F1 Development Driver with Williams Martini Racing
GP2 Series (6th with 2 wins), F1 Development Driver with Williams Martini Racing
GP3 Series with Carlin Motorsport (champion)
European F3 Championship (3rd), Macau Grand Prix (winner), Masters of Formula 3 (2nd)
British Formula 3 Championship (3rd), Macau Grand Prix (3rd)
British Formula Renault Championship (champion)
British Formula Renault (champion), Winter Series Championship (champion)