Why interwar British battleships did not simply copy Renown

Why did Britain base interwar sixteen-inch battleships on the Nelson line rather than on HMS Renown?

The new design sought better armour and six guns firing forward, which favoured Nelson's concentrated layout over a Renown derivative.

Later British sixteen-inch battleships needed stronger armour than a Renown-derived design would provide. Designers also wanted six heavy guns able to fire forward, concentrating offensive power in the expected approach. Nelson's all-forward main armament addressed those requirements more directly than a scaled development of Renown.