When did the Mk IIa series 1 Hurricanes first enter service ?
Firefly I / FR.I Two variants of the Mk I Firefly were built ; 429 " fighter " " Firefly F Mk I " s , built by Fairey and General Aircraft Ltd , and 376 " fighter / reconnaissance " Firefly " FR Mk I " s ( which were fitted with the ASH detection radar ) .