Flossie

Flossie is a name, that could be the nickname for someone named Florence. There are three characters with the name:
 * Flossie (The Secret Adversary)
 * Flossie Carrington (The Plymouth Express)
 * Flossie Gapp, the real name of Merlina Rival (The Clocks)
 * Flossie Monro (The Adventure of the Peroxide Blonde, later chapter 14 of The Big Four)