A faster four-shaft Nelson design

How might the Nelson class change if Britain broke the naval treaty limits?

The proposed alternative resembles F3, with four shafts, more engine power, and about 28 knots.

The replies first distinguish breaking the treaty from exploiting wording Britain helped draft. For a Nelson built outside those limits, the suggested result resembles an F3-style design. The proposed changes are greater engine power, four shafts, and a speed of about 28 knots. This would give the ship a different machinery arrangement from the historical design.