Three Tribals for the price of one Dido

Would high-angle, dual-purpose 4.7-inch Tribal-class destroyers have been a better purchase than Dido-class cruisers?

Potentially: at the cited prices Britain could buy roughly three Tribals for one Dido, but production capacity, treaty rules, other destroyer programs, crew needs, and the cruiser tasks left uncovered all complicate the substitution.

Approximate unit costs of £1.48 million for a Dido and £513,000 for a Tribal make a three-for-one exchange plausible if suitable dual-purpose guns and production capacity existed. The personnel for three Didos could crew about seven Tribals. The arithmetic remains incomplete because the change would affect other destroyer construction, shipyard allocation, and the need for true cruisers. Tribals could perform most Dido tasks, while cruiser yards freed from Dido construction might build more Crown Colony or Arethusa-class ships for the jobs destroyers could not cover. The exchange shows how force-structure choices propagate through money, labor, industry, and mission coverage.