The aircraft will cost even more than the carriers,coming to billions of pounds,and most are yet to be built - yet for some strange reason this country managed without super carriers for decades even cancelling the CVA01 in the 1960s. None of these carriers or the aircraft they have are going to help protect the country against internal threats,piracy or even the extended conflicts we have been involved in.
Then you need to consider the fact the carriers went over target in costs,and it means the more important ships in the navy,ie,frigates etc either have to their weapons downgraded,or we simply end up buying fewer and less capable ships than what was needed,not including the fact that every time one of these carriers deploys we will need to have half our fleet sail with them as they as carriers are very vulnerable without their associated fleets.
They look very impressive,but the fact of the matter they will only be probably used against countries which have hardly any navy,and for any country that does have a capable one,would we really be risking them in the first place?
The fact of the matter is the world has changed and the threats have changed with them - you only have to look at the other countries which tend to have large carriers outside the US. They tend to be more vanity projects - I mean even the French decided against another carrier when we were designing ours,as originally program was meant to be a joint one
IIRC,and I get the impression the smaller carrier they have is considered a bit of a white elephant.
Edit!!
Plus include the fact that the carriers will incur costs by them sitting just in a dock doing nothing,they will need refits,etc so in the end to save billions we will eventually spend billions more. Its not even a design that has some degree of export potential either.