Harvey moved to London in 2015 and joined the Clapham Chasers running club. She was employed as a corporate lawyer prior to being made redundant during the
COVID-19 pandemic. She initially began training for a half-Ironman, but focused purely on running and in April 2021 ran 2:31:14 at the Cheshire Marathon. In October 2021, she ran 2:29:45 in the
London Marathon placing 15th, followed by running 2:27:17 at the
Seville Marathon in February 2022. She made her major championship debut at the
2022 World Athletics Championships held in
Eugene, Oregon. In October 2022, she finished the London Marathon in 10th place as the fastest British woman in a time of 2:27:58. In October 2023, Harvey ran a new personal best time of 2:23:21 to finish ninth at the
Chicago Marathon. The time also met the qualifying mark for the upcoming Olympics and placed her as the fifth fastest all-time British female marathon runner. On 26 April 2024, she was selected by British Athletics for the
2024 Summer Olympics in
Paris where she finished 78th in a time of 2:51:03, despite starting the race with a stress fracture in her femur. Running at the
2025 London Marathon Harvey placed ninth in a time of 2:25:01, and was the second British woman to finish, after
Eilish McColgan, who placed eighth. Harvey was again the second Brit to finish behind McColgan, running a time of 2:26:14 for another ninth place finish at the
2026 London Marathon. {{Cite web | url= https://athleticsweekly.com/news/tigist-assefa-retains-her-london-crown-with-another-world-record-1040010981/ |date=26 April 2026 == References ==