This would be the dates that the aircraft entered service, not its first test flight or first day of production.
British
Boston Mk III (Jan. 41)
Hurricane Mk I (Mar. 1938)
Hurricane Mk IIC (April. 1941)
Hurricane Mk IID (Sept.. 1941)
Lancaster III (March 1942)
Mosquito Mk VI (May 1943)
Seafire Mk II (Oct. 1942)
Spitfire Mk I (Aug. 1938)
Spitfire Mk V (Feb. 1941)
Spitfire Mk VIII (Oct. 1943)
Spitfire Mk IX (April 1943)
Spitfire Mk XIV (April 1944)
Spitfire Mk XVI (Nov 1944)
Tempest Mk V (June 1944)
Typhoon Mk I (Sept. 1941)
Seafire Mk II (Jun. 1942)
Spitfire Mk I (Dec. 1938)
Spitfire Mk V (Mar. 1941)
Spitfire Mk VIII (Jul. 1943)
Spitfire Mk IX (Jun. 1942)
Spitfire Mk XIV (Jan. 1944)
Spitfire Mk XVI (Dec. 1944)
Tempest Mk V (Apr. 1944)
That's what I remember reading from Alfred Price and other Osprey Book authors. Yikes, pal. Change your sources
