Penelope Keith is remembered for her performances as sharply observed, socially superior characters in British television sitcoms, with accounts from Guardian pieces describing her distinctive comic style and presence on and off stage. In particular, she became widely known for playing Margo Leadbetter in “The Good Life” (1975–1978), where her character contrasts with the more relaxed lifestyles of the central couple, portrayed by Richard Briers and Felicity Kendal. Her roles elsewhere are also noted, including “To the Manor Born,” in which Keith similarly performs a “classy hauteur” marked by mischief.
The coverage emphasizes that Keith’s comedy depended not only on writing or character types, but also on her timing and ability to vary a recurring theme. Rather than playing snobbery as a single-note trait, she appears to make each character feel distinct through tone and nuance. One recollection also points to early indications of her talent, including work in theatre settings in the early 1960s and later stage performances at the RSC, culminating in a career that expanded from theatre into prominent screen sitcom success. She dies aged 86.