4th April 1941:
"Second Officers Pitman and Guinness attended for confirmation of appointment flight test on the 30th March, 1941 and both were successful.
Miss Guinness is considered above average for the amount of experience she has had."
Veronica Innes (who started on the same day, mentions her (and the conformation of appointment flight test) but simply says she "unfortunately, failed to make the grade and retired early from the scene."
[... but so far, no more details of the mysterious Miss Guinness have emerged]
[Grania Guinness, who joined the WAAF in May 1942, told me that she was never in the ATA]