Richard John Winter & Anor v Philip Henry Winter & Anor

Detriment remains essential to proprietary estoppel and must be assessed in the round. Where reliance produces both disadvantages and benefits, the court must determine whether there is sufficiently substantial net detriment. Financial benefits must be weighed against non-financial disadvantages even when the latter cannot be quantified.

A claimant who makes a life-changing choice and devotes many years to work in reliance on an assurance may establish detriment through the lost opportunity to lead a different life. The claimant need not prove a specific alternative career or show that it would probably have produced greater benefits. This conclusion is not automatic. Any considerable financial benefits received through the chosen course must remain part of the evaluative assessment.

Richard and Adrian Winter worked for most of their lives in their family's market-garden business. Their parents had led them reasonably to expect that the business and its assets would ultimately be divided equally among the three sons. Their father later left his residuary estate, including his interests in the family partnership and company, to the third son, Philip.

Zacaroli J upheld Richard and Adrian's proprietary estoppel claim in [2023] EWHC 2393 (Ch). He ordered the relevant partnership interest and company shares to be held for the three brothers equally. Philip appealed only against the finding of detriment. The central issue was whether lifelong commitment and lost opportunities could outweigh the substantial financial benefits which Richard and Adrian had received from the business, despite their failure to prove that a specific alternative career would have left them better off.

1. The appeal was dismissed unanimously. Detriment is an indispensable element of proprietary estoppel. The doctrine's concern with unconscionable conduct does not permit a claim to succeed without detrimental reliance. The assurance and the reliance-induced detriment must together make it unconscionable for the promisor to resile.

2. Detriment is neither narrow nor technical. It can include non-financial disadvantages and consequences that cannot fairly be reduced to money. Where reliance has generated both disadvantages and benefits, however, the court must weigh both. An unquantifiable disadvantage is not a trump card against a financial benefit, and the balancing exercise remains necessary despite the difficulty of comparing unlike considerations.

3. Where a claimant has made a life-changing choice and undertaken work over many years in reliance on an assurance, the lost opportunity to lead a different life may itself amount to detriment. The claimant need not prove a specific alternative course which would probably have been more beneficial, nor must the court attempt the unrealistic reconstruction of an alternative life. Such circumstances will probably support a finding of detrimental reliance, but they do not do so automatically. Considerable financial benefits derived from the chosen course must still be weighed against the lost opportunities.

4. The trial judge had undertaken the required evaluative exercise. Read in context, his reference to the impossibility of a meaningful comparison “in financial terms” did not mean that he considered all comparison impossible. He had addressed the contention that the substantial financial benefits outweighed the brothers' lifelong commitment and had concluded that they did not.

5. That conclusion was reasonably open to the judge. The brothers had devoted their working lives to the business from before leaving school, worked long hours for relatively low pay while profits were reinvested, remained subject to parental control over important decisions, and lost the possibility of pursuing other options. An appellate court could not intervene merely because another judge might have reached a different evaluative conclusion.

1. Court of Appeal (Civil Division): In [2024] EWCA Civ 699 , unanimously dismissed Philip Winter's appeal against the finding of detriment.
2. High Court of Justice, Business and Property Courts in Bristol, Property, Trusts and Probate List: Zacaroli J upheld the proprietary estoppel claim in [2023] EWHC 2393 (Ch) and ordered the relevant partnership interest and company shares to be held for the three brothers in equal shares.