If there is a silver lining to this IT cloud, next time ATC has an outage it can tell its major shareholder BA that at least it was only a couple of hours disruption to some BA flights, unlike their more than one day disruption to all their flights due to their IT. Indeed I can think of an ATC firm who could offer some consultancy in high integrity IT to BA/IAG.
What happened to Iberia in all this? Were they immune from this BA problem?