Why Renown received reconstruction before Repulse

Why did the Admiralty modernise Renown before Repulse?

Renown had seen less use and was the cheaper ship to repair and reconstruct first.

Renown had been used less and was therefore cheaper to repair and modernise. Material condition mattered because reconstruction began with the wear already accumulated by each sister. The Admiralty chose the ship that could be returned in improved condition for the lower immediate cost. Reconstruction order followed practical economy rather than sentiment or simple favouritism.