Awkward questions
Bombay Duck, yes I do have an idea; and from what little I know Pakistan is more likely to send unpleasant brainwashed suicide bombers at you than try anything military.
We're having Typhoon because we're stuck with building it, and hope it'll make some money as an export.
JSF because the Harrier is getting long in the tooth and we're keeping an ability.
Just as people like me think our Trident replacement programme is a vast waste of money which would be a lot better spent on our NHS,
it's hard to justify ( and distinctly poor international P.R. ) to build up arms while taking aid hand-outs for your own people who seem to be regarded as an unfortunate irrelevance.