[3] She played Desmonda in the 2012 Jack Studio Brockley production of Othello[4] and went on the 2014 tour with The Two Worlds of Charlie F. She had further theatre roles as Anna in Future Conditional at the Old Vic in 2015 and Nathalie in Mosquitoes at the National Theatre in 2017.

[5] In 2018 and 2019, Barclay played Selina in the BBC Two legal sitcom Defending the Guilty[6] and Alisha in the Hampstead Theatre production of Everyday I Make Greatness Happen,[7] had a small role in the film In Darkness, and was cast as Adela Zal in a pilot for a potential NYPD Blue spin-off series on ABC.

[9] Barclay had recurring roles as Zarina in the 2021 Channel 4 sitcom We Are Lady Parts[10] and Dr Sullivan, Roy Kent's (Brett Goldstein) sister in the second and third seasons of the Apple TV+ sports comedy Ted Lasso.

[12] The following year, she played Suzy Ray in the romantic comedy Love Again[13] and voiced Malala Windsor (Spider-UK) for the Marvel animated sequel Spider-Man: Across the Spider-Verse.

[14] In July 2024, it was announced Barclay would star opposite Leo Suter in a Lynley revival for BBC One and BritBox.