LM, not the only duds that were carried around. The primary weapon for the Nimrod Mk 1 was the Mk 44 torpedo until replaced by the Mk 46.
The fuse didn't work until right at the end when we flew two sorties just to see if they had fixed it. The first sortie was a bust as the RN Armament Depot workers sabotaged the weapons There was some dispute, I don't recall what.
The second drop, targeted at the sea bed didn't miss and we heard a satisfying bang.