text:  systems were hit and why others weren't, why others managed to get theirs up so quickly and others weren't. That's probably all going to be part of the post-mortem once this is completely fixed. And in terms of assessing the disruption, we know that there's chaos at airports all over the place. Some airlines have still got their planes on the ground. That's one of the most obvious examples of this kind of thing. But it's playing out in hospitals, supermarkets, cafes, at ports. The list is endless of places that are