How Did Margo McLennan Die?

Eileen Marguerite McNenemy professionally known as Margo McLennan, she was also billed in her early acting career as Margo Mayne and briefly as Margot McLennan and Marco McLennan, was a British-born actress, singer and dancer who was active in England and Australia, where she became best known to international audiences for her role in the Australian TV cult soap opera Prisoner,