Would a modified Type 42 replace a new carrier-defence destroyer?

Would the larger carrier fleet produce a small Type 43 or another dedicated air-defence coordinator?

A modified Type 42 combining Sea Dart and Sea Wolf is more likely than funding a separate Type 43 design.

The existing Type 42 production path would probably dominate the decision. A later batch might combine Sea Dart area defence with Sea Wolf point defence instead of creating a separate Type 43. Six-round Sea Wolf launchers could occupy wing positions while leaving Sea Dart and the 4.5-inch gun in their existing positions. The precise layout remains open. The procurement judgment is evolutionary: add capability to a funded hull rather than justify an entirely new class. That choice matches the scenario's preference for minimum-cost ways of meeting an assigned mission.