Her father Mark Doyle, from Clonmel, is a former jockey and her mother Caroline rode in Arab horse races.

[1] Doyle moved as an apprentice jockey to the Wiltshire yard of trainer Richard Hannon in 2014 and rode out her claim in November 2017.

[5] Doyle's first win at Royal Ascot came in June 2020 when she steered 33/1 chance Scarlet Dragon to victory in the Duke of Edinburgh Stakes.

[8] On 29 August 2020 Doyle rode five winners in one day at Windsor Racecourse, making her the first female jockey to win five races on the same card in Britain.

[10] On 17 October 2020, Doyle became the first female jockey to ride a winner on Champions Day at Ascot, when she steered Trueshan to victory in the Long Distance Cup.

This was followed by a win in the Champions Sprint on Glen Shiel, trained by Archie Watson for whom Doyle rides as stable jockey.

[11][12] Doyle finished the season fourth in the flat jockeys' championship, which at the time was the highest ranking for a woman.

[17] Sherbert Lemon, a 28/1 outsider, finished ninth of 14 runners,[18] a record placing for a female jockey in a British Classic race.

[20] Doyle rode her 152nd winner of the year on 22 October, surpassing her own record for a British female jockey of 151 wins in 2020.

[21] On 3 June 2022 Doyle rode Nashwa, bred and owned by Al Sagar and trained by John and Thady Gosden, into third place in the Oaks, a record for a female jockey in a British Classic.

[26] On 16 January 2023, Doyle fractured her elbow and ruptured ligaments after her mount The Perfect Crown suffered a fatal injury during a race at Wolverhampton.

[28] In June 2023 she secured her second European Classic, the Group 2 Oaks d'Italia at San Siro Racecourse in Milan, riding Shavasana for trainer Stefano Botti.

[29] Later that month she became the first female jockey to ride a Group 1 winner at Royal Ascot, when Bradsell, trained by Watson, survived a stewards' enquiry to take the King's Stand Stakes.