Where did you find that? Closest I could find that this may be the earmarks for the (never built) Conqueror and Thunderer which were Lion class.
They were. Actually reading the original article reaveals those orders would bring the number of Battleships under construction to nine, and carriers to six.
Allowing for the 5 KGVs and 2 Lions already ordered, it makes the battlerships Conqueror and Thunderer. And the carrier the Indefagitable.