the final camel that broke the jigsaw's back

Top analytical skills from the talking head they wheeled in on the Today programme on Radio 4 this morning to talk about the ramifications of the British Airways-Iberia merger: not content with making reference to "a lot of testerone" flying about in regard to the current union difficulties BA are having, he went on to use the word "murder" instead of "merger" at least once, and then refer to the deal being "the final jigsaw in the puzzle" for BA's plans for world domination. Perhaps just the one schooner of sherry for breakfast next time?