Knowler is an uncommon English surname, a toponymic derived from knoll (Old English cnoll), with the suffix -er common in Kent and Sussex.
In May, Knowler moved out of his apartment, stayed with Fujii and her children for a few days, and then moved to his father's residence in Cochrane, Alberta.
Air Ministry specification F.20/27 was issued during the design process and Saunders decided to submit the A.10 even though that specification only called for two guns and suggested the use of the radial Bristol Mercury rather than the inline Rolls-Royce F.XIS that designer Harry Knowler had chosen.