Thanks for your inputs. Mrs yt is concerned about booking such a long journey using multiple suppliers and ticketing. She thinks, perhaps not unreasonably, what happens if one of the legs is late and we miss a connecting flight? Who is responsible etc.
She also feels that if we go say via CDG/AMS that she would like to travel there the day before and have an over-nighter which of course reduces the financial attractiveness of split carrier ticketing.
Any further thoughts?