Can't see D8 doing an Oslo, if routes like BRU and FCO don't stack up, you can rule it out. In relation to LGW, apart from potentially amounting to financial suicide, they'd be unlikely to go in, there seems to be a bit of friendly neutrality going on between FR and DY/D8, FR have been scaling back on Oslo routes, blaming taxes, which by default helps DY, MOL made approaches on the topic of D8 getting permission to fly IRL-USA, and while that may suit his agenda of hitting Aer Lingus, it also smacks of collaboration between the two. Talk of interline is hot in the media, it would seem the two can compliment each other well ..