Q&A: four Admiral-class battlecruisers reshape later names

If Britain had completed all four Admiral-class battlecruisers, what would the fourth have been called and how would that affect later battleship names?

The fourth was to be Rodney, so a later Nelson-class partner would have needed another admiral's name, perhaps Collingwood or Boscawen.

Rodney was the planned name for the fourth Admiral-class battlecruiser. If all four ships had entered service, the later Nelson-class pair could not have reused Rodney. A second ship might instead have honoured Collingwood or Boscawen, assuming the treaty-era battleships were still built. One procurement counterfactual can propagate into later class identity without requiring a change in design.