As I understand it, the ad claimed that Ryanair was the biggest airline in Europe. By what criteria? On fleet size, departures, capitalisation, passenger figures, and anything else I can think of, it is eclipsed by other airlines (this is not just a comparison between Ryan and BA). So, as I see it, Ryanair is using misleading advertising. Again.. .I'd say that there isn't much future in that, as a couple of court cases against FR have recently shown. Is reasonable, accurate advertising beyond them? After all, they've got plenty they can legitimately shout about!