The QE2 class carriers need to get within 560 miles of the target for their F35Bs to be able to do anything useful. I think the QE2s are a bit big for coastal operations, so there's a very limited scope for targeting until the marines have gone ashore and secured suitable locations for an operational base from which the F35Bs can operate. It seems to me that rather than force-projectors, these monster flat tops are not much more than militarised versions of the Atlantic Conveyor. A fleet of half a dozen Illustrious replacements would have made more sense.