A fast Agincourt would likely carry twin six-inch secondaries

What secondary armament would suit a 28-knot Agincourt with 18-inch main guns?

Probably three or four twin six-inch turrets, following the same general direction as Renown.

The proposed 28-knot Agincourt needs a secondary battery suited to a 1914-era fast capital ship. The answer favors twin six-inch turrets rather than a larger number of exposed single mounts. Three or four turrets would follow the direction later seen in Renown's design. The choice links the speculative ship to contemporary British thinking about protected, turreted secondary fire.