Claim: Winifred Lawson, an opera singer remembered for her soprano performances was invited by Rupert D'Oyly Carte to be a full time member before playing Yum-Yum in 1923.
Evidence: Winifred Lawson (15 November 1892 – 30 November 1961) was an English opera and concert singer in the first half of the 20th century. The proprietor of the company, Rupert D'Oyly Carte, invited her to become a full-time member, and during the rest of the 1921–22 tour she took on the roles of Patience in Patience, Casilda in The Gondoliers and Elsie Maynard in The Yeomen of the Guard. She added the roles of Phyllis in Iolanthe in the 1922–23 season and Yum-Yum in The Mikado in July 1923.