BREXIT will certainly affect the Norwegian Air UK (NAUK) US permit application submitted on 11 Dec, 2015. Another protracted application, similar to that by “Ireland based” Norwegian Air International (NAI), will have the effect of delaying expansion plans, as with the Cork/Boston service.
Aftenposten newspaper reports; "The airline Norwegian lost big on the Oslo Stock Exchange Friday" - Link:
Norwegian-aksjonærer tapte en milliard kroner på Brexit - Aftenposten