Pairing the K3 battlecruiser with the L3 battleship

Which battleship design would pair best with K3 as a post-Hood battlecruiser?

L3: an 18-inch-gun, strongly protected 25-knot battleship design that complements the K3 concept.

L3 is the preferred design here because it matches the K3's 18-inch armament while providing a distinctly powerful and well-armoured battle-line companion. The design carries nine 18-inch guns and a large secondary battery. Its protection includes a heavily sloped belt, strong bulkheads, and substantial deck armour. The trade-off is speed: at about 25 knots, L3 supplies the deliberate battle-line strength while K3 fills the faster battlecruiser role.