[1] She had four sisters, Edith Alice (1871–1959), Mary Beatrix (1875–1965), Ada Francis (1877–1965), and Eldred Elizabeth (1879– 1939),[2] and two brothers.

[5] The Thornycroft family home in Bembridge had a model ship testing facility in its grounds, built in 1884, but disguised as a decorative water system known as “The Lilypond”.

[6] The Experimental Boat Testing Tank Facility, at the Steyne Wood Battery in Bembridge on the Isle of Wight, (Grade II Listed Building Number 1426608) has six angled glazed panels below a concrete walkway, linked to a boiler within the battery to warm water, which was installed by Thornycroft as part of her interest in hydroponics.

[7] Some of Blanche's monographed notebooks, recording her test notes from 1907 until 1939, along with the ship tank models used in her engineering calculations, are held at the Classic Boat Museum in East Cowes.

Other models tested ideas for Acasta and Acheron Class Destroyers, motor torpedo boats, RAF Rescue Launches, as well as RNLI Lifeboats.