Thanks SaturnV! Big pinch of salt then.... If it's true then the coincidences relating to the seat numbers of the unfortunate passengers who were never found in each case are thought-provoking - so long as his "facts" are right.
Curmudgeon predicted an avalanche of replies to my original post (the idea of which left me slightly apprehensive, given the nature of some replies I have seen elsewhere!) but no-one seems to be interested. Maybe I should take the hint!