Three Valentia prototypes were built by the Vickers Company at their Barrow works (Walney Island perhaps), having been ordered in May 1918 as a potential replacement for the Felixstowe F.5. The hull was built by S.E.Saunders works at Cowes. The first of the three (Serial Number N124) first flew on 5 March 1921, when Stanley Cockerell began test-flying it over the Solent.[2] N124 was damaged on landing in June 1921 and was dismantled, the second N125 forced landed on its delivery flight on 15 March 1922[3] The third flying boat N126 was delivered in 1923 and used for trials until it was withdrawn from use in November 1924.
^Chorlton, Martyn, ed. (2012). Aeroplane Collectors' Archive: Golden Age of Flying-boats. Kelsey Publishing Group, Cudham, Kent. p. 89. ISBN978-1-907426-71-1.
^"Air Ministry's New Flying Boat", The Times, 8 March 1921
^Wixey, Ken, "Flying Boats of the RAF: 1920s 'One-offs' ", FlyPast No. 106, Stamford, Lincs., U.K., May 1990, page 68.