So the deep thoughts.....
IF.....if only they had funded even a single new military drydock in the UK, say on the north shore by Davenport during the 20's and 30's.
One 1,500ft by 140ft by 32ft dock would permit a Forrestal scale CV and support a fleet of 4 at least. Coupled with the docks at Cairo and in Australia they could have had their Malta.
IF....if only the RN had run a treaty busting CV design before WWII. They'd hit their practical limits as I've outlined earlier. But the resultant CVs have a greater future proofing and could be run on Implacable propulsion.
IF......if only there had been a UK Skyhawk-type solution to N/A.39.
Sadly they started the 1952 effort on the basis of a navalised Canberra.
IF....if only they'd started the Medium Fleet CV studies concurrently with the Large Fleet Carrier in 1952.....
IF....if only the 30 inch diameter light turbojets had been funded instead of the cheap option of the Gyron Junior.
IF....only they'd not spent precious time and money on the flexible deck concept.
But the simplest option is that treaty buster CV.
Length: 850ft fd, 800ft wl, 770ft lbp.
Width: 120ft-130ft fd, 104ft wl.
Draught: 28-33.5ft.
Displacement: 45,000tons deep load and about 35,000ton standard.
Give it 144,000shp and it's good enough for 30kts clean and 28kts d&d or thereabouts. But as long as it cruises at Fleet Speed......
Because a fleet of 4 such would rapidly be repeated instead of the Irresistible-Audacious process and Malta would quickly die off as soon as they hit the drydock problem.
Having gotten used to such ships, the next gen would be preceded by modernisations and the transition to new ships of similar dimensions but perhaps just three sets of the new Y300 plant.
Voila! No Victorious rebuild, no disparate force of Implacable and Audacious types.
Centaurs likely cut at 3.
1952 effort gets cut short by '54 (N/A.39 relieving the pressure) if not by '53..Medium Fleet CVs proceeded with by '55.
And next gen is dominated by the need to fund a larger military drydock from 1940. While the implications for plant, props and shafts also triggers finding for propulsion upto 60-70,000shp per unit.
However by the 1960's the next gen effort will likely be cut and the RN will have to soldier on with it's Meduin Fleet CVs......into the 1990's that is.
Irony of ironies, such a size of flat top would be fine for STOVL aircraft, though at the smaller end of CVF studies.