Nielson’s love for comedy played a defining role in her career. Despite advice that focusing on lighter roles might limit future opportunities, she chose to follow her passion. This decision ultimately led to one of her most recognized appearances in 1979, when she featured in the Fawlty Towers episode “Waldorf Salad.” In the episode, she played Mrs. Hamilton, a confident American guest whose interactions contributed to one of the show’s most memorable moments. Her performance remains part of a widely appreciated episode that continues to be celebrated by audiences.

Beyond acting, Nielson pursued a range of creative interests. She was an accomplished painter, wrote and illustrated a children’s book, and co-authored a guide about grandparenting with her family. She also contributed to drama workshops for schools and enjoyed music and cooking. Later in life, she returned to academic study at King’s College, Cambridge, focusing on English literature. She is survived by her husband, actor Paul Greenwood, and her daughter. Her legacy reflects a life dedicated to creativity, learning, and artistic expression.