Cameron: UK Will Operate 2 Aircraft Carriers (DefenseNews)

Ah, you beat me to it. Of course, Cameron isn't likely to be PM next year.

Certainly its true that many such decisions are only as good as long the governments that make them are still in power.

How many times Cameron did change catapults for skijump ramp?

It was going to be ski-jump when originally proposed (all the way back in 1998 in the Strategic Defence Review done under Blair), changed to cat and trap in 2010 in the review done under the Coalition and changed back a couple of years later when it was found it was going to cost more than they thought.