Captain radar,
I understand that The Sun newspaper is looking for people who can write impressive one-liners. Leave your job as a Captain on a boating lake in Cleethorpes and take up a new job as a super-hack.
Of course the A400M can be redesigned as a dual role Maritime-Intel aircraft. With a bit of cargo carrying as well.
If the will is there, any aircraft can be redesigned.
The Comet was redesigned as the Nimrod, the fuselage is completely different.
The Poseidon cannot fly to the Falklands, which as an island near oil reserves will become increasingly important in the future. Peak oil has already been passed. A new airport with a very long runway, will need to be built, probably on East Falkland. The only alternate for Falklands, is Chile. Aircraft with plenty of fuel to spare will be needed.