if an event appears under aerodrome notams only, then a narrow route briefing will not pick it up.
That is interesting as I wouldn't normally pick up notams for the aerodromes on my route of flight, apart from a diversion or two.
Perhaps it is time for the Air Law exam to be amended to include picking up pre-flight notams and such like? Not sure if it has any such questions as it is a decade since I did it...