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I stumbled on this very recent addition to the TSR2 wiki article, apparently added recently from info released from Archives in the middle of this year.
So WI Macmillan hadn't limited the yeild of tac nukes to 10kt, and let the TSR2 carry the 2 x 200kt bombs and 2 x drop tanks instead of 4 x 10kt nukes? Would that have been one less straw to break the camels back, and get the TSR2 into service?