Lilian Josephine Pocock (1883–1974) was a stained glass artist as well as a theatrical costume designer, book illustrator and watercolourist. She was the daughter of the painter Lexden Lewis Pocock. Her training included lessons from 1906 at the Central School of Arts & Crafts. There she was taught by Karl Parsons (1884-1934), who had himself been taught at the school by Christopher Whall (1849-1924). Pocock left in 1910 to become Parsons’ assistant.
Lilian Pocock on Wikipedia
The Artists of the Glass House by Alan Brooks and Peter Cormack, The Journal of Stained Glass, Vol. XLI, 2017