On the mentioned night they catched some NLC above ALOMAR (Norway) by LIDAR. The NLC layer lasted for some hours, approx. 2100 UTC - 0130 UTC. Maybe the last detection for this season but good to see that they had some luck at this late date. Measurements have been poor there this season because of weather as many of us know too good.
Don't know of any visible observation that night.
EDIT: Maybe there are some few signs during the daytime of the 15th, too: