I doubt we will ever even get the F35C.
I suspect that the carrier(s) will be delivered well after their announced date. They are being built because it is cheaper to go ahead with them than cancel them - so I can't see HMG putting a lot of pressure on the constructor once the inevitable cost overruns and delays start to build up. Indeed, HMG might well prefer to string out the construction process for as long as possible in order to secure construction jobs.
By the time they are delivered, we will have been without any FW naval aircraft for a very long time - and unless there is an unexpected UOR I can't see HMG itching to rebuild the capacity.
My guess is that we are building the world's biggest and most expensive helicopter carrier.