In the 1974 Second City Firsts episode "Girl", Frances performed, with Alison Steadman, the first lesbian kiss on British television.
She is best known for her recurring role as Anne Tranter in the 1970s television drama series Survivors and for her appearance in the 1979 Doctor Who serial The Creature from the Pit, in which she played the villainous Lady Adrasta. She also appeared in several comedy films of the 1970s including Don't Just Lie There, Say Something! (1973)
She also played James Hadleigh's love interest, Stella Clisby, in the fourth series of Hadleigh, as well as playing a barrister, Valerie Scott, in several episodes of Crown Court in 1976.