"Brabazon Committee" became a catch-all for subsidy by Ministry of (1/4/46) Supply to the Aero industry, seen as great white hope for bombed, broke UK in something to counter US' industrial scale. Only the Massey Ferguson tractor, Austin Californian and Land Rover might come close. We had turbines, US, then, did not, so MoS funded Rivers and Gods in hope something might match US Big Piston reliability. No-one 4/46 thought to hear market perceptions of UK air transport industry, 'cos we didn't have one. All Ministers knew was evidence by United A/L boss to Congress, that the transatlantic market might sustain a dozen a/c (not types: units). So, as well as turbines we had Empire, where revenue was Protected by cabotage. So MoS redefined Brabazon Type III (Empire), where piston Tudors, Hermes were underway, to be Type IIIC, funded 4/46 as Avro 693, 4xRR Clyde, then 4xASM Mamba; 11/46, 4xAJ65 (to be RR Avon, in wing root).
But 27/7/47 Avro (and HP) were preferred responders to the Medium Bomber, so Avro 693 was chopped. Bristol was at that time favoured and was not consumed on Bombers, so won (Vulcan)'s engine, already had Type 1/Transatlantic (Centaurus piston for Mk.I, Proteus planned for Mk.II), and bid a Proteus solution* to Type IIIC's successors, Medium Range and Long Range Empire, both met by Britannias. Which were unduly protracted. Some insemination moved from Avro 693 (and Tudors) to (1/12/45) Avro Canada C-102 Jetliner, itself to be protracted by priority on CF-100 fighter, and by RR on making Avon work for UK military types.
So: If MoS had rejected very weird wings for the Medium Bomber (staying with conventional Short Sperrin, Vickers Valiant), and/or
If C-102 had not been shackled, then:
Just about when the Korean fracas occurred, Comet 1 and portly Avros might be on order (in small batches) by, well, everyone.
(* amended 1730,2/1/24: T.175 began with, and was ordered for BOAC with Centaurus 28/7/49, changed 12/50 to Proteus).
