What would I bin?
SSBNs. Who exactly are they deterring? How exactly do they credibly deter assymetric threats? Is there any other sort of threat, now?
Carriers. Even the most optimistic cost them at £5Bn. That would be 200 Gripens or F-16s.
JSF. Without carriers we could have a cheaper, more effective, less bloated FJ to replace OS/Recce Harriers and Jaguars, which could fulfil most of the FOA requirement and do some limited AD.
Heavy armour.