Squirrel 41,
As sensible as it might be to actually buy the jets, it just ain't going to happen. Until the stupid system* by which the Treasury runs the country's finances is utterly overhauled, there won't be money to buy the jets.
*A system that forces departments to spend what remains in a pot of cash, before financial year's-end, in order to prevent it being clawed back by the Treasury. If 'excess' cash could be saved, and wisely used on another project, in other than a current financial year, this country might make massive savings. But the civil service mandarins wouldn't like that loss of control, would they? Chimps.