Turbine Ambassador
Though it now seems odd that no turboprop was offered, t'was not so in late-1940s.
UK's Brabazon Committee suite funded into R&D 1943-46 Types to build NOW, to employ the vast Aero industry, to earn and save $. Comfort to defeat Dakota was expressed in the Continental as armchair space. AS.57 was designed with 4 wing points for ASM Mamba turboprop in Mark II, but was to be brought into rapid Service with tried and tested Centaurus. Insurance Continentals were funded as Mamba/AWA Apollo and VC2 Viceroy.
BEAC observed Dart/VC2 first flight 16/7/48 and ordered 20 Ambassadors 22/9/48 as "low-risk": turbines then were seen as expensive, TBO maybe rising to 00s, not the 000s hours expected of sound pistons (BOAC's 28/7/49 order for 25 Britannias was with Centaurus, same reason).
DH subsumed Airspeed as a Divn. in 1948 to build Vampire/Venom. Neither DH nor MoS cared to sponsor turbo-AS.57 in the absence of a civil customer-prospect. But on 3/8/50 BEAC ordered 20 VC2 as V.701 Viscount: within days of its introduction, Ambassador was doomed.