Only complete Valiant out of 107 built that survives at RAF Museum Cosford, which also has on display a Victor and a Vulcan. XD818 from No. 49 Sqn. dropped Britain's first live H-bomb in 1957 during Op. Grapple. It was converted to a tanker in 1961.
XD674, the first of 9 development T.1s, spent most of her time with Hunting Percival and Armstrong Siddeley. Service trials of the T.1 began at the CFS, RAF Little Rissington in July 1955, and from August 1955 at 2FTS based at RAF Hullavington.