cazatou sums this up very well; few people actually understand the Nimrod MK4. How do you argue from such a starting point?
Clearly, if you take the formers and stringers designed for a Comet 4, shortened by 6' 6", the tailplane and fin core, the product must be a Comet. Boeing must agonise over that logic every time they recycle a B707.
Can somebody remind me how old the RR Trent is now?