Michael John Spencer v Estate of John Mitchell Spencer (Deceased) & Ors

Proprietary estoppel requires an assurance of a proprietary interest, reasonable reliance and detriment, assessed in the round rather than as watertight compartments. Clarity is context-dependent, and statements about future inheritance may qualify even if the property’s extent changes. Detriment includes substantial non-financial consequences, such as committing a working life to a family farm and abandoning other opportunities. If repudiation is unconscionable, fulfilment of the promise is the starting point. Relief may be adjusted where full enforcement would be out of all proportion, but lifelong detriment is rarely valued by simple financial comparison. The remedy is assessed at the time of relief and may preserve crystallised non-agricultural value for the estate.

Michael claimed against his late father’s estate, alleging that repeated assurances entitled him to inherit the farmland owned by his father and that he had relied on those assurances to his detriment. The father’s final will placed the freehold farmland in a discretionary trust for the family. The central issues were whether proprietary estoppel arose, whether the repudiation was unconscionable, and how the resulting equity should be satisfied, including the treatment of land with mineral value. A constructive trust claim based on the same facts was pleaded but was not pursued in submissions.

1. Disposition. Michael established an equity arising from proprietary estoppel. The provisional remedy was transfer of the farmland to him excluding the New Quarry Land. He was to receive the agricultural value of that land, while its remaining non-agricultural value was to remain in the estate. Detailed machinery, valuation, tax and any disclaimer of Michael’s residuary interest were left outstanding.
2. Requirements. The court applied the three elements of proprietary estoppel: assurance, reasonable reliance and detriment. They are not watertight compartments and must be assessed in the round. An assurance must be sufficiently clear in context and objectively understood as intended to be taken seriously. It must concern a proprietary interest in specified property, rather than merely a job, role or responsibility. The extent of farmland may fluctuate during the promisor’s lifetime without creating conceptual uncertainty.
3. Application. The repeated statements that Michael would inherit the farm, viewed in the context of the father-and-son relationship and their course of dealing, were assurances of the farmland rather than merely of the farming business. The assurances were a significant inducement to Michael’s continued commitment to the farm. His detriment included low wages, accepting his father’s control, long and demanding work, and giving up the opportunity to pursue the Colsterworth truck-stop venture. The benefits he received did not eliminate the substantial and largely unquantifiable detriment of committing his working life to the farm.
4. Unconscionability. Repudiation was assessed at the date of the father’s death. There were no circumstances justifying it. The father’s concern about Michael’s health and whether Michael’s sons would continue the farm did not make repudiation fair.
5. Remedy. Applying Guest v Guest [2022] UKSC 27, fulfilment of the promise was the starting point, subject to practicality, justice, third-party fairness and proportionality. The remedy had to be assessed when relief was granted, although detriment was judged at repudiation. The crystallised non-agricultural value of the New Quarry Land would otherwise be an unintended windfall and could properly remain with the estate.
6. The constructive trust claim was not determined because it was conceptually directed to beneficial co-ownership during the father’s lifetime, whereas Michael’s case concerned an expected inheritance, and submissions concentrated on proprietary estoppel.