I want to know the answer to the following question:
What is the British Navy constructing to replace their three Invincible-class carriers?
All the background I'm provided with is that "Their primary aircraft complement will be made up of F-35B Lightning IIs, and their ship's company will number around 680 with the total complement rising to about 1,600 when the air group is embarked.". Is that enough to answer the question?