A better-protected Renown at Jutland

What if the Renown class had been available at Jutland with nine inches of armour?

They would strengthen the British battlecruiser force substantially and make the German scouting force's task much harder.

A faster, better-protected Renown at Jutland would be a serious problem for the First Scouting Group. Nine inches of armour would give the ship more ability to remain in the battle than the historical protection scheme. Its speed would still let it work with the British battlecruiser force. The operational effect comes from adding another credible heavy unit to the line rather than from one statistic alone.