But that's not what he said. He said they are considering all the possible scenarios and registering both of the kids for schools in several places. At least, that's the impression I was left with. He tried to stress that, at least twice, but maybe some viewers missed that because Adele interrupted to comment on her own experience, and they were laughing/joking about some schools in the UK are so competitive/selective that you need to register your children while still in utero.
I don't know that they've made any determination yet about where they will be living in four years when Leonore is ready for school. It sounds like they are just taking things as they come and seeing what shakes out. Heck, at this point, we know that there will be at least two more kids in front of Madeleine's children in the line of succession, and there very possibly could be more than that. It wouldn't surprise me one bit if CP/Sofia have another child, possibly more, in that time frame. If that's the situation, then I assume Madeleine & Chris will be under far less pressure to move to Stockholm, or the Swedish public might find it acceptable for Madeleine's children to attend a Swedish school in London while remaining in the line of succession since the chances of them ascending the throne are so small.