"Vanguard"s design was revised again, while the ship was under construction in 1942, to reflect lessons learned from the loss of the battleship and operations with the other battleships. The longitudinal distance between the inboard and outboard propellers was increased from to reduce the chance of a single torpedo wrecking both propeller shafts on one side and watertight access trunks were added to all spaces below the deep waterline to prevent progressive flooding through open watertight doors and hatches as happened to "Prince of Wales". This change and the relocation of some of the ammunition handling rooms from the lower deck to the middle deck seriously delayed the ship's completion. The design requirement that the guns of 'A' turret be capable of firing straight ahead at 0° of elevation was sacrificed to allow her freeboard forward to be increased, and her bow was reshaped to make it less prone to shipping water and throwing sea spray in head seas. The ship's fuel supply was increased from to to prevent the fuel shortage problems suffered by and during their pursuit of the . The Unrotated Projectile mounts were deleted from the design and the light anti-aircraft armament was increased to a total of 76 two-pounders in one quadruple and nine octuple mounts and 24 Oerlikon 20 mm cannon were also added in 12 twin mounts. Space for these was made available by removing the two floatplanes, the catapult and their associated facilities.