The vapourware of the airline industry Brief letters

The Guardian - Heathrowmp;#146;s third runway and aircraft emissionsTaking the hintEditorial mischiefGirls and ladiesThe bleeding obviousGeorge Monbiot coins the word mp;#147;perceptionwaremp;#148; for technology trailed but never trialled, and only intended to impress the credulous (The expansion of Heathrow would be an expensive disaster for Britain and the world. Burnham needs to block it, 3 October). But the IT industry has long had a word for this: mp;#147;vapourwaremp;#148; mp;#150; which