A US carrier battlegroup contains the carrier itself, and a cruiser and two destroyers to protect it. We will have two carriers and a grand total of 6 destroyers, no cruisers. So the choices are abandon all other commitments and use the entire rest of the Royal Navy for force protection for the carriers, or leave the carriers as sitting ducks. Yes I know only one carrier will be at sea at a time. All six destroyers won't be at sea at the same time either!
Did I mention no cats and traps? That means we are forced to rely on rotary wing for AEW - a decision that cost dearly in the Falklands. Helicopters simply don't have the altitude or endurance for that mission. So we have a fleet that can't see, can't fight, and can't stay at sea for very long. And there's no money left.