Hannah is a five-time British Champion, a two-time World Champion and a European Champion. 

Her paratriathlon career began in 2017 after it was included on a list of things she wanted to achieve following her amputation. She completed a super sprint triathlon before going onto become British Champion that same year. In 2018 she made her international debut and won gold at Eton Dorney ITU Paratriathlon World Cup. Following a third place finish at Franciacorta ITU World Paratriahlon Series she was crowned European, British and World champion in just three months.

Hannah stretched her winning run to six straight wins, including another British Championships, at the start of 2019 before she recorded a DNF at the Tokyo Paralympic Games Test Event. Her winning form quickly returned though as she won another world title in Lausanne at the end of the season. A fourth British title arrived in 2021.

After a couple of years away from the sport, she returned in 2023 with a bronze medal at the European championships in Madrid. That was followed up with a victory in A Coruna before securing a silver medal at World Triathlon Para Series Swansea. Hannah then captured a fifth British title before narrowly missing out on another World Championship medal as she finished fourth in Pontevedra. Her season ended on the podium though as she finished third at World Triathlon Para Cup Alhandra.