Or Both...
Probably end up getting the AH-64E's, retro-fitting them with UK engines and parking them up in some dusty hangar somewhere for 10 years while the MOD and the Contractor argue over the misconstrued expectation that they are actually expected to fly after the fit. Contractors defence being that the contract didnt actually specify it!
Out of interest... How many A-10's could you fit on a QE Class .... ? Never mind about the taking off bit, that's a mere technicality...