The dock-capacity figures support a counterfactual path from armored cruisers to treaty-era heavy cruisers. Royal Navy yards had many spaces for ships around 20,000 to 21,000 tons, while larger warships could use far fewer. A distinct cruiser force in that size band could have worked alongside battleships and battlecruisers without demanding the same scale of yard expansion. The point is a conditional force-structure argument about infrastructure and does not describe the ships Britain actually built.
Notable Point · 7:32-8:25
Existing docks favored a 20,000-ton cruiser force
Britain's many docks for ships around 20,000 to 21,000 tons made an evolved armored-cruiser line easier to sustain than larger battlecruisers.