Reflecting on her role in the rural comedy, Keith told The Guardian in 2013: "I loved it because we had to do all our own stunts."
She added, "I am a country girl at heart, and I got to ride horses again, to learn about bee keeping, to drive a two-tonne Rolls-Royce with impossible gears; I scaled a five-bar gate with a picnic hamper to flee a bull."
Beyond television, Keith won an Olivier Award in 1976 for "Donkeys' Years." She served as president of the Actors' Benevolent Fund for 30 years, succeeding Laurence Olivier.
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In 2014, she was appointed a dame for her services to the arts and charitable organizations.
