didn't some MP or other not forecast the end of Manned military flight back in the 1960's. That lead to TSR2's cancelation.
I can see a role for UAV in some roles but at times i think having a mk 2 brain in the cockpit makes more sense.
The canberra is probably going to have a UAV replacing it.
would it be possible to replace Nimrod MPA/ R with UAV or would the band width for the Data transfare be prohibitive?