Thanks David63 , that's helpful, sounds like it should be an easy process then, fingers crossed !
I keep thinking about trying for same cabin, but we are doing Fjords which I feel is worth the cost of the balcony and then Northern Europe for New Year for 5 days which I prefer to save my money and have inside cabin..........I do feel lucky to even have these choices there are far worse dilemmas to have ! 🙂