Portrait and figure painter and draughtsman in ink and pencil, born and lived in London. She studied part-time at Hornsey School of Art, but was largely self-taught. Her early work included fashion drawing and she was influenced in her plant form pictures by those of Graham Sutherland. Knoblock was a member of Free Painters and Sculptors and Hesketh Hubbard Art Society. Mixed show appearances included RI and RP. Solo shows included Commonwealth Institute, Thames Gallery in Henley-on-Thames, the Hendon, Hampstead and North Finchley Libraries and abroad, where Knoblock travelled extensively.