Muir has been a member of the England U20s and U18s sides.[3] In 2021, she was named as part of the England squad for the 2021 Women's Six Nations Championships as one of six development players on the side.[4] She was a non-playing reserve in the opening two Six Nations games against Scotland and Italy.[4] She was named in the England squad for the delayed 2021 Rugby World Cup held in New Zealand in October and November 2022.[5]
In 2022, Muir left Wasps to join Gloucester-Hartpury.[2] She was part of the team that won the 2022–23 Premier 15s title.[2] She signed a new contract with Gloucester-Hartpury in February 2025.[14]
Early life and education
Muir grew up in Oxford, and attended Cherwell School.[15] She began playing rugby in Oxford at a young age, and joined the Oxford Harlequins (U6-U11) and then moved to the Gosford All Blacks, joining the U15 and later U18 sides.[3][16]
She represented the South West at age grade level and moved to the Wasps' Centre of Excellence before joining the senior team.
She was awarded a Brunel Sports Scholarship, allowing her to train as a professional athlete while studying a sports science degree.
Muir played cricket until she was 12, partly because her mother preferred watching cricket to rugby. She was an excellent fielder but only an average batter.[3] In 2025, she hosted a workshop with teammates Ellie Kildunne and Lucy Packer which aimed to "inspire the next generation of female players at Chinnor Rugby Club in Thame, Oxfordshire."[16]
