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. Two were cancelled when the First World War ended, and the third went to the S.E.Saunders works at Cowes for completion. Stanley Cockerell began test-flying it over the Solent in March 1921. Airframe crashed and was written off, June 1922.
The name was later re-used for a transport aircraft.
Data from Vickers Aircraft since 1908 
- Length: 58 ft 0 in (17.68 m)
- Wingspan: 112 ft 0 in (34.15 m)
- Height: ft in (m)
- Empty weight: 10,000 lb (4,545 kg)
- Loaded weight: 21,300 lb (9,682 kg)
- Powerplant: 2 × Rolls-Royce Condor piston engine, 600 hp (448 kW) each
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- "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.
- Andrews and Morgan 1988, p.482.
- London 2003, pp.266—267.
- Andrews, C.F and Morgan, E.B. Vickers Aircraft since 1908. London:Putnam, 1988. ISBN 0-85177-815-1.
- London, Peter. British Flying Boats. Stroud, UK:Sutton Publishing, 2003. ISBN 0-7509-2695-3.