Viscount

Ref Devon C.2/2: the conversion to Gipsy Queen 70 Mk.3 (equivalent of the civil Dove Mk.8) was done in two phases: Phase 1 was the introduction of the new engines, while Phase 2 was the replacement of the canopy with a Heron canopy, giving the distinctive raised profile. But in all of the official DH paperwork, the designation ‘C.Mk.2/2’ never appears. They were only ever referenced as ‘C.Mk.2’. It is someone’s corruption of the phases of modification, but that in itself does not lead to an official designation and therefore should not be quoted. It is, however, far more accurate to identify them as ‘C.Mk.1’ (original), ‘C.Mk.2 Phase 1’ (engine mod) and ‘C.Mk.2 Phase 2’ (engine and canopy mods).

My explanation, which will hopefully appear in the book whenever it gets completed, should give much more information.