If the Royal Navy had built eight Type 82 destroyers, would it still have built the Type 42 class?
Short answerProbably yes, but in smaller numbers; the likely outcome is about eight Type 82s and eight Type 42s rather than one class eliminating the other.
NotesThe counterfactual asks what eight Type 82 destroyers would mean for Type 42 construction. The suggested outcome is a mixed force of eight Type 82s and eight Type 42s. More Type 82s therefore need not eliminate the later class. This is a brief estimate without a detailed cost or force-planning calculation.