The counterfactual does not require Hood's full prewar reconstruction, but relief from Force H could permit reconditioned machinery and improved sensors. A radar fit comparable to Prince of Wales would strengthen Hood's gunnery in the Denmark Strait. Renown and possibly additional carrier or battleship support could also join the wider interception. Even if Bismarck still scored a catastrophic hit on Hood, the British force would retain more heavy guns and would feel less pressure to deploy Prince of Wales before she was fully ready.
Notable Point · 32:49-34:37
A refitted Hood changes the Bismarck hunt
Reduced commitments could give Hood an engine, sensor, and partial protection refit before Bismarck's sortie.