After making contact with an unsighted, stationary car at over 120mph during a British F4 race at Donington Park circuit, Billy was left with life-changing injuries and received amptuations to both legs.
Despite the huge personal challenges that lay ahead, Billy wasted no time in setting out his goal to return to motor racing in the future.
Fuelled by an outpouring of support from the motorsport industry and the wider public, Billy embarked on his remarkable journey to a different future.
In a car specially modified by Carlin, Billy made his return to racing in March, 2018, in the British F3 Championship, a series that has fostered drivers such as Aryton Senna, Jean-Eric Vergne and Daniel Ricciardo.
Taking part in the first qualifying session of the season,less than a year after his horrific accident, Billy placed his Carlin British F3 car fifth on the grid.
Billy went on to finish an incredible third and walked onto the podium.
In a programme that has so far been funded and under written by Carlin, we are now looking for partners and sponsors to make Billy’s dream of continuing in the junior formulas a reality and helping him develop into a Professional Racing Driver.
"All the support just makes me more determined to get back in the car and win again. That's my goal" - Billy Monger
After showing well in the Euroformula Winter Series, Billy was confirmed in the Carlin Racing quartet for the 2019 Euroformula Open Championship.
Billy completed his incredible comeback story by winning the prestigious Pau Grand Prix, claiming his first single-seater triumph since having his lower legs amputated in 2017.
Less than a year after his life-changing accident at Donington Park, Billy returned to single-seater racing - claiming an emotional podium on his first race back.
Billy took two pole positions and three podiums on his way to 6th in the championship standings.
In his second season racing in British F4, Billy was leading the Challenge Cup standings, after taking 2 overall podiums in the first five races of the 2017 season. Despite his accident, Billy caught the hearts of a nation, inspiring many with his positive attitude in-light of his double leg amputation.
Following his dream to race in Formula 1, Billy made the natural step up into Formula car racing.
In his maiden season in the British F4 Championship, Billy took three podiums and a pole position - scoring 78 points in total.
2014 saw Billy take 2nd overall in the 2014 Winter Series, taking two podiums and victories in the process.
Billy was in the hunt for regular race wins and a championship challenge, taking two wins, seven podiums and a pole position - taking 5th in the standings.
Over this period, Billy was seeded 8th in the MSA British Junior Karting Championship, before competing in Europe with Forza Racing in the WSK Euro Series and the CIK-FIA KF3 European Championship.
Alongside his eye-catching performances racing in Europe, Billy competed for the British Kart Grand Prix Title in the hugely competitive Comer Cadet class, finishing 6th in the Kartmasters Final.
In his second season competing at British Championship level, Billy swept the competition and won the championship title with a race to spare.
Following on from an impressive club racing career, which saw him develop from a Novice - to a regularly race winner, Billy made the step up into the Super One British Karting Championships.
Billy finished an impressive 5th overall in his debut season at this level.
Billy was stuck in his vehicle for 90 minutes until he could be airlifted to Queens Medical Centre in Nottingham, but tragically medics could not save his legs.
The incident shook the motorsport community and led to a fundraising campaign for Billy's rehabilitation and recovery that raised more than £800,000 - Formula 1 drivers Lewis Hamilton, Jenson Button and Felipe Massa were amongst the supporters.
Despite the accident, Billy hasn't let losing both lower legs scupper his motorsport ambitions. Eleven weeks after his accident, the Formula 4 driver was back behind the wheel with help from Team BRIT, which helps disabled drivers and ex serving military to take part in motorsport.
Monger drove a specially adapted car fitted with steering wheel mounted hand controls for the throttle, brakes and clutch.
Since his accident on the 16th April 2017, Billy has returned to racing - taking an emotional podium on his first race back at Oulton Park, as well as becoming a multiple podium and pole position holder during the 2018 Season.
Billy has since been actively raising awareness for disabled sports people, charities and medical groups - who's help and care saw him return to racing. Within a year of his accident.
"It just shows you when a tragic event like this happens how people pull together. I have still got few years in me for sure so I want to prove how much you can do even with something like this." - Billy Monger