Some of you may be interested in a recent Judgment of Laffoy J in the
Irish High Court concerning this issue.

http://www.courts.ie/Judgments.nsf/09859e7a3f34669680256ef3004a27de/e0781c04edcdd727802579ab005b5ac6?OpenDocument

English, New Zealand and Canadian authorities are considered (to some
extent) though Counsel seem to have been at one in rejecting the
Australian constructive trust remedy.
It is perhaps unfortunate that this alternative approach was not considered.

Best wishes,
Ger