Just for information - it turns out that while vy.no have cool new recliner seat/beds on their sleepers they are not included in the Interrail scheme so you have to book them at full price.
With a 1st class pass at least - you can book a sleeper for 1000 NOK as a flat fee. this is good value. Or you can book a seat for free. Also good value, if not optimal for an overnight journey.
On the leg that I wanted to book today there were no sleepers left so I asked about the lie-flat beds and the price would have been 1,949 NOK as they are not included in the scheme.
I reckon this is probably just because the agreement hasn’t been updated as it makes no sense for 2 classes of travel to be bookable, but the 3rd one to be not bookable.
Best answer by rvdborgtView original