And to answer the question about staffing versus passengers, the forecasts didn't envisage such huge growth in the face of Brexit and such, even the MAN TP forecast had us at 30m in 2020-2022 period, but looks like we may hit that next year at this rate, so, one could say yes, pax demand has outstripped staffing for a short while.
Not to drag it on but security is an operational issue and MAN would of been aware about capacity plans for this summer for quiet some time. If there are an extra 10-15,000 passengers passing through terminals per day then resources have to be examined. It's not hard to recruit seasonal staff and long queues will damage retail revenue for an airport as people will be going straight to gates.
I do agree it would be irresponsible for MAN to make any rash decisions in regard to TP until maybe 2020 until any potential fallout is clear.