I have never yet seen both security scanners open at INV even when there have been very long waiting times (>30mins). When asked about this it is because they don't have enough staff.
Trouble is that even then the departure lounge can't cope with the number of pax for more than two BA/RYR/EZY flights and a couple of EASTERNs. Maybe they are slowing passengers at Security to reduce congestion in the dep lounge?
