Henderson was born in
Hemel Hempstead,
Hertfordshire in 1998 and grew up in
Edlesborough in
Buckinghamshire. She attended
Aylesbury High School. Growing up, her ambition was to win an Olympic medal in the Winter Olympics. She was a competitive ski racer, however in 2015, a major crash in the National Championships in
Tignes forced Henderson to step back from Skiing and used cycling as a rehab method, she then changed her interest to cycling. She made the decision when she was fifteen. She had broken her leg and cycling was prescribed as helpful to her recovery. As a result, cycling became her focus. In 2018, Henderson won the
British National Circuit Race Championships, and the under-23
British National Time Trial Championships in 2019. In 2022, Henderson secured a silver medal in the Time Trial at the
2022 Commonwealth Games where
Grace Brown of Australia took the gold medal. This was Henderson's first major medal representing her country. In September 2023 she was in the Netherlands at the
UEC European Road Championships. She was second in the Women's Time Trial and she was eighth in the
Road race. She had come home in the time trial in first position, but Switzerland's
Marlen Reusser finished after her with a better time. She took a silver medal in the
time trial at the
2024 Summer Olympics behind
Grace Brown of Australia on very wet Parisian roads. ==Major results==