Complex sentence: She is best known for her roles as Jenna Stannis in first two seasons of the British science fiction series "Blake's 7" and as Kate Sugden in the soap opera "Emmerdale".
Split into simpler sentences: She is best known for her roles as Jenna Stannis in first two seasons of the British science fiction series "Blake's 7". She subsequently appeared as Kate Sugden in the soap opera "Emmerdale".