by 42 points from nearest rival
Jolyon Palmer. Like many drivers, Stoneman began his career in
karting. He made his first steps in single-seaters in 2006 when he competed in selected rounds of the
Formula Renault BARC. He raced in the series full-time in 2007, finishing as runner-up to
Hywel Lloyd. He also finished sixth in the
Formula Renault 2.0 UK Winter Series. Stoneman moved to the main Formula Renault 2.0 UK championship in 2008 and took three wins on his way to fourth in the standings. He was also nominated for the
McLaren Autosport BRDC Award. Stoneman finished fourth again in the standings in 2009, this time with just one race win. Stoneman won the
FIA Formula Two Championship in 2010, securing a test drive with the
Williams F1 team at the end of the season. On the first day of the young drivers test in Abu Dhabi he set the fifth fastest time, just under two seconds slower than pacesetter
Daniel Ricciardo. In 2011, Stoneman had been planning to progress to the Formula Renault 3.5 series, joining fellow young driver tester Ricciardo at
ISR Racing, but he was forced to skip the season after he was diagnosed with
testicular cancer. Stoneman spent 2012 competing in
powerboat racing (his father, Colin, was a previous champion) as he regained fitness, winning the P1 SuperStock UK powerboat title in 2012. He returned to car racing in the 2013
Porsche Carrera Cup Great Britain season after recovering from his illness, winning both races on his debut weekend along with pole position in qualifying. Later in the season, Stoneman had accumulated too many points on his licence and was given a two race ban, which he served at the Rockingham race weekend. Stoneman returned to single-seater racing in late 2013 driving for
Koiranen GP in the last two races of the
2013 GP3 Series season. Stoneman signed with
Marussia Manor Racing for
2014 GP3 season. Stoneman drove for Manor in the first seven race weekends. Following Manor's folding four races before season's ending, Stoneman switched to
Koiranen GP replacing
Carmen Jordá. Stoneman finished second in the drivers championship. In 2015, Stoneman moved to the
Formula Renault 3.5 Series with
DAMS having picked up the backing of the
Red Bull Junior Team. Stoneman finished sixth overall in the Formula Renault 3.5 scoring 130 points. Stoneman joined
GP2 series with
Carlin for the last three events of the
2015 season. Stoneman finished GP2 season 24th overall with one point. In 2016, Stoneman moved to
Indy Lights driving for
Andretti Autosport. He finished fifth in the Indy Lights championship. In addition to competing in Indy Lights, Stoneman tested an Andretti
Dallara IR12 Indycar in August of that year. In March 2017,
Strakka Racing announced that Stoneman would race for them in 2017, sharing a
McLaren 650 GT3 with
Andrew Watson and
Jazeman Jaafar in the
2017 Blancpain GT Series Endurance Cup. ==Personal life==