Without wishing to appear disrespectful to our American cousins, have we in the UK learned nothing from experience? The only other occasion (post WW2) when we bought operational war-planes from the USA was when we bought F-111s. In case you are wondering why the RAF and Navy never actually got them, it is because the contract was cancelled before we took delivery. Why? Because the thing was way over budget, way behind schedule and didn't meet its performance targets! Does this sound familiar?
We ended up paying for them anyway - even though we never got them - because the idiots at the MOD had apparently signed the contracts without reading the small print!
At least on that occasion, we still had other aircraft of our own manufacture on which we could fall back.
This time, the idiots in charge scrapped our Harriers and their carriers before the replacement had even flown in prototype form! As a result, we will be without a useful carrier borne aircraft for over a decade, and reliant on the charity of the US - or France (!) - should we need one!
Even when we do get them, they will be far too few and far too expensive to risk in actual operations. And all being paid for with money that we really can't afford to spend.
It makes you want to weep!