I have had a very similar case to this but concerning a farmer who was a bachelor and a claim by the ex wife of his nephew. Proprietary estoppel was established similarly giving the wife a claim to capital. Very complicated and interesting area of law but we at Freeths do have the resources necessary to advise in these sorts of cases.
Proprietary estoppel case concerning a family farm where the son claimed that his father had promised that he would inherit the lion's share of the farm. The claim was made out