Just curious, no criticism offered, just some points;
Unless QF have downgraded it, the A380 is Cat3b capable, yes?
At a time when fog is prevalent, it would be expeditious of QF to ensure it's crews are Cat2/3 current I would have thought? (The weather in LHR can be crap at any time of the year!)
Is Melbourne Cat 2/3 capable and was it operational?