Former British racing driver Billy Monger has become the fastest double amputee to complete the Ironman World Championship course in Hawaii. Monger, who had both his legs amputated after a near-fatal crash in 2017, began training for the event over a year ago and set his sights on the previous record for a double leg amputee. And he ended up smashing that previous record by two hours, three minutes and three seconds in a time of 14 hours 23 minutes 56 seconds. Monger raised his fists and let out a huge roar as he crossed the finish line and revealed on social media he had to contend with sever…