The son of James and Elisabeth Grossart, William Grossart scored five victories flying the D.H.4 with 205 Squadron in 1918.
Distinguished Flying Cross (DFC)
Lieut. William Grossart.
During the last two and a half months this officer has carried out twenty-seven successful bombing raids and twenty-five special photographic reconnaissances, his services on the latter duty being exceptionally valuable. This officer possesses a fine spirit of determination; neither strong opposition nor adverse weather conditions deters him from achieving his object.
Supplement to the London Gazette, 21 September 1918 (30913/11251)