Mason began her acting career in 1994, and her first credited role was as Laurie Henderson in the CITV children's television series Three Seven Eleven, and later that year appeared in the television film The Whipping Boy. In 1995, she played a receptionist in an episode of in the crime drama She's Out, before joining the cast of the ITV police procedural television series The Bill as W.P.C.
Mason began her acting career in 1994, and her first credited role was as Laurie Henderson in the CITV children's television series Three Seven Eleven. Later that year, she appeared in the television film The Whipping Boy. In 1995, she played a receptionist in an episode of the crime drama She's Out before joining the cast of the ITV police procedural television series The Bill as W.P.C.