“On the valuations and other figures adopted by the judge, and in the light of all the circumstances found by him, his award to the respondent was: (a) plainly too high (b) reached without any proper application of the principles not only of need but also, and in particular, of sharing (at any rate in the light of the fact that a substantial part of the appellant’s wealth was inherited); and (c) reached without regard to the ability or otherwise of the appellant to raise, and to deploy in England, the cash sums required by his order to be paid by her.”