In May 2017, Charles won Ironman Lanzarote. Furthermore she also won the Challenge Family's The Championship. She also won a second place at the Ironman European Championships. She won the swim in that race in 48:29 minutes and finished the race only 4 minutes behind winner
Sarah Crowley. At the Ironman World Championship in October 2017, she again landed a second place behind four time World Champion
Daniela Ryf. In April 2018, at Ironman South Africa, Charles won her second Ironman race. In the same year she again won Challenge's The Championship. In September, she came second at the Ironman 70.3 World Championships. At the
2018 Ironman World Championship in October she again landed in second place behind Daniela Ryf and broke the swim record with 48:13 minutes. Her overall time of 8:36:24 is the second fastest in race history. In 2019, Charles won Challenge Roth and the
European Ironman Championships with her personal record of 8:31:09 hours for the entire race. She followed that with a third consecutive second place finish at the
2019 Ironman World Championship, clocking 8:46:44. In 2021, she won the Ironman 70.3 World Championship, finishing over 8 minutes faster than her nearest competitor. In 2023, she became the Ironman World Champion in
Kailua-Kona after four times coming second. In 2024, she received two second place finishes at the
PTO T100 Triathlon, one to
India Lee in
Miami and another one to
Ashleigh Gentle in Singapore. She announced that she planned to validate her slot for the 2024 Ironman World Championships held in
Nice,
France. She succeeded in validating her slot with a win in Ironman France. In the
London leg of the T100 tour, she injured herself on the run and was forced to withdraw, her first ever professional DNF. Charles-Barclay began her 2025 season with a 3rd place finish at the Singapore
T100 Triathlon. Only
Kate Waugh and
Lisa Perterer ahead of her. She followed this with wins at Ironman Lanzarote and Ironman 70.3 Eagleman. In august she won the
T100 London and the
T100 Spain in september. She finished the season with a win at the 2025
Ironman 70.3 World Championships. She is one of the strongest swimmers in
triathlon. Charles lives in Chingford, Essex, and is coached by her husband Reece. ==Notable results==