Why HMS Africa became a battleship name

Why was the name Africa moved from a planned Drake class cruiser to a King Edward VII class battleship?

The name had enough prestige to be assigned to a battleship, with imperial naming practice also shaping the choice.

Royal Navy names could move between projected ships before construction settled the final allocation. Africa carried enough inherited prestige to justify use on a battleship rather than a cruiser. The period also favored names drawn from imperial geography and identities, as seen in other contemporary classes. Prestige and the naming culture of the time are the most likely reasons for the transfer.