According to the Air New Zealand website they are in October adding a second daily service from London to New Zealand via Hong Kong, not reducing the via Los Angeles service. We had no trouble at all getting checked in and through security at LA, in fact the longest Q we experienced was at Heathrow on the way out.
Thank you also for your kind comments regarding my fathers death. This unfortunately meant we had to cut short our vacation and miss the 12 days we had planned at our villa in Orlando, but that is something we can always do again.
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