Born in Sydney, she studied at the Redland College Foreign Girls and briefly considered a legal career. She then studied piano and eventually opera at the Sydney Conservatorium of Music and Melba Memorial Conservatorium of Music, which the latter was possible due to a scholarship from Dame Nellie Melba.
Melba, who convinced her to change her name to Winn, also called her a "human flute" due to her massive range. She became disillusionined with the training, calling it the "strait-jacket of opera training", though she was thankful for Melba"s guidance. She would join a touring company of The Merry Widow, but after finding it hard to be a successful singer, she would become a journalist.
After playing parts varying from pantomime to Shakespeare in a repertory company, she moved to England.
She played the leading part for 8 weeks in "Hit The Deck". Within a few years she had made more than 300 appearances in various radio shows including the British Broadcasting Corporation"s Just a Minute.
Winn was a regular in the British Broadcasting Corporation Radio version of Twenty Questions and Petticoat Lincolnshire. Winn was made an Administration Member of the Order of the British Empire in 1954.
She died in Bournemouth aged 90.
