Britain answers a German 26-knot battleship

How would Britain respond to an oil-fired German 26-knot battleship?

By pursuing an approximately 28-knot battleship with heavier guns, despite the machinery challenge.

A 26-knot German battleship would challenge Britain on quality rather than only numbers. The likely response would be a roughly 28-knot British design with larger guns, though the necessary machinery might strain contemporary technology.