Would Dreadnought have appeared without Tsushima?

Would HMS Dreadnought have been built if the Battle of Tsushima had not happened?

Yes; Tsushima strengthened the case, but all-big-gun designs were already emerging, and British industry delivered Dreadnought first.

A viewer asks whether HMS Dreadnought would have appeared without the Battle of Tsushima. Tsushima confirmed ideas already circulating rather than creating the all-big-gun concept from nothing. An Italian design was moving in a similar direction and had been ordered before the British ship. Britain's industrial capacity allowed Dreadnought to be built, launched, and commissioned first, so her name defined the type. The answer separates technological convergence from the publicity effect of one battle and one exceptionally rapid building programme.