The Most Important Family Business Cases

Q: What is the most important family business case?

There is no single most important case, but Ebrahimi v Westbourne Galleries Ltd 1973 is the foundational authority on quasi-partnership and remains the starting point for any family business analysis. The case established the three indicators of quasi-partnership and confirmed that the courts will look behind the corporate form to the underlying relationship between the parties.

Q: Which case sets out the test for unfair prejudice?

O'Neill v Phillips 1999 is the modern authority on the test for unfair prejudice. Lord Hoffmann set out the framework that the courts apply today. The question is whether the conduct complained of departs from the terms on which the parties agreed the company would operate, including any legitimate expectations that flowed from those terms.

Q: Does a minority shareholder always get a discount on valuation?

It depends. In a quasi-partnership case the court usually values the shares without applying a minority discount: see Re Bird Precision Bellows Ltd. In a non-quasi-partnership case a minority discount usually applies: see Strahan v Wilcock. The petitioner's own conduct can also affect whether a discount applies, as in Davies v Lynch-Smith.

Q: Can the court require parties to mediate?

Yes. The Court of Appeal in Churchill v Merthyr Tydfil County Borough Council confirmed that the court has the power to stay proceedings and order the parties to engage in non-court dispute resolution. The case overruled the previous authority of Halsey v Milton Keynes General NHS Trust on this point. Parties who refuse to engage in mediation risk significant costs penalties.

Q: What about cases where a family member was promised a share of the business?

The leading authorities on proprietary estoppel in the family business context are Thorner v Major, Gillett v Holt and Guest v Guest. The doctrine can give effect to informal promises where the person relied on the promise to their detriment. Family members who have worked in the family business for years on the strength of a promise that was not honoured may have a remedy.

Family business cases have shaped how the courts deal with disputes between family members about businesses they own together. Specifically, the case law on unfair prejudice, quasi-partnership, share valuation, mediation and proprietary estoppel has developed over more than fifty years. As a result, the modern legal framework for family business disputes is built on a series of landmark decisions that every family business owner benefits from understanding at a high level. Importantly, this is not a textbook treatment. By contrast, it is a practical guide to the twenty-five cases that come up most often in family business work, what they decided, and why they matter to family business owners today.

This page summarises the most important family business cases in plain English. Specifically, the cases are grouped by theme: the foundations of unfair prejudice, share valuation and the minority discount, conduct of the petitioner, related family law claims, and the modern mediation framework. Crucially, the cases here are referenced repeatedly throughout this hub and are the cases family business advisers turn to first.

The foundations of unfair prejudice

1. Ebrahimi v Westbourne Galleries Ltd [1973] AC 360

Specifically, this is the foundational case on quasi-partnership and just and equitable winding-up. The House of Lords held that the petitioner could be granted a just and equitable winding-up where the basis of association between the parties had broken down. Importantly, Lord Wilberforce identified the three indicators of a quasi-partnership: association on the basis of mutual trust and confidence, an understanding of participation in management, and restrictions on the transfer of shares. As a result, Ebrahimi remains the starting point for any quasi-partnership analysis. For more, see quasi-partnership in family companies.

2. O’Neill v Phillips [1999] 1 WLR 1092

By contrast, O’Neill v Phillips is the leading authority on the modern test for unfair prejudice. Specifically, Lord Hoffmann set out the framework for identifying unfair prejudice in section 994 cases. As a result, the inquiry is whether the conduct complained of departs from the terms on which the parties agreed the company would operate, including any legitimate expectations that flowed from those terms. Importantly, O’Neill v Phillips is the case the courts apply today. For more, see unfair prejudice petitions.

3. Re Sam Weller & Sons Ltd [1990] Ch 682

Specifically, this case is the foundational authority on the have and have-not pattern. The court held that paying low dividends while diverting value to working family members through other routes can be unfair prejudice. Importantly, the case made clear that the fair use of company assets, not just the strict legal rights attached to a shareholding, is part of what a member’s interests include. As a result, Sam Weller remains the archetypal authority on the dispute pattern that dominates family business work. For more, see the have and have-not pattern.

4. Re Cumana Ltd [1986] BCLC 430

By contrast, Re Cumana established that excessive remuneration paid to working directors can constitute unfair prejudice. Specifically, the Court of Appeal held that paying salaries far above market rate while suppressing dividends is itself unfair conduct. As a result, the legal protection for non-working shareholders does not require proof of actual misappropriation. Importantly, it can be enough to show that the working family members have arranged their remuneration to deprive the non-workers of the return they would otherwise have received.

5. Irvine v Irvine [2006] EWHC 406 (Ch)

Specifically, Irvine v Irvine concerned two brothers who had been equal partners in an insurance broking business. The brother who worked in the business paid himself substantial sums while declaring minimal dividends. Importantly, the court held that the conduct amounted to unfair prejudice and ordered a buyout. As a result, the case is particularly instructive on the position between working and non-working siblings in a family business.

6. Fisher v Cadman [2005] EWHC 377 (Ch)

By contrast, Fisher v Cadman concerned a sister who had tolerated for thirteen years her brothers’ failure to hold AGMs, provide information or declare meaningful dividends. Specifically, the court held that the conduct amounted to unfair prejudice notwithstanding her long acquiescence. Importantly, the case confirms that have-nots do not lose their rights by waiting too long to raise them. Crucially, this is one of the most useful cases for passive shareholders who have allowed concerns to build up over many years. For more, see the passive shareholder.

Share valuation and the minority discount

7. Re Bird Precision Bellows Ltd [1986] Ch 658

Specifically, this is the leading authority on share valuation in quasi-partnership cases. The Court of Appeal confirmed that in a quasi-partnership, the shares should ordinarily be valued without applying a minority discount. Importantly, Nourse J at first instance reasoned that the parties had agreed at the outset to participate on equal terms and the court should not allow the majority to use the form of incorporation to defeat that agreement. As a result, the no-discount rule has been the starting point for quasi-partnership valuations ever since. For more, see family business valuation in a dispute.

8. Strahan v Wilcock [2006] EWCA Civ 13

By contrast, Strahan v Wilcock established that a minority discount is the default position in the absence of quasi-partnership status. Specifically, the Court of Appeal held that where the company is not a quasi-partnership, the ordinary rule of a minority discount applies. As a result, the question whether a particular company is a quasi-partnership often determines whether a discount applies.

9. Profinance Trust SA v Gladstone [2002] 1 WLR 1024

Specifically, this is the leading authority on the valuation date in unfair prejudice cases. The Court of Appeal confirmed that the starting point is the date of the court order, but the court has wide discretion to depart from that. Importantly, the case provides the framework for the strategic question of which valuation date to argue for in any particular case.

10. Re Sunrise Radio Ltd [2009] EWHC 2893 (Ch)

By contrast, Re Sunrise Radio illustrates that even a quasi-partner can be required to accept a minority discount where their own conduct justifies it. Specifically, the court applied a discount in a quasi-partnership case where the petitioner’s behaviour meant they should be treated less favourably. Importantly, the decision was upheld on appeal as Kohli v Lit [2013] EWCA Civ 667. As a result, the case is a reminder that the petitioner’s conduct matters in any unfair prejudice valuation.

11. Davies v Lynch-Smith and others [2018] EWHC 2336 (Ch)

Specifically, Davies v Lynch-Smith went much further than Sunrise Radio. The court applied a 60 per cent discount to the petitioner’s shares on the basis that the petitioner had behaved in such a way that he should be treated as a willing seller rather than as someone being forced out. Importantly, the case is a salutary reminder that quasi-partner status does not protect a petitioner whose own conduct has been part of the problem.

12. Re Solent Garage Services Ltd; Lewis v Clarke [2020] EWHC 1975 (Ch)

By contrast, Re Solent Garage Services is a recent illustration of the court’s broad-brush approach to valuation in smaller cases. Specifically, the judge eventually arrived at £45,500 by combining a dividend multiplier with a forward-looking value adjustment, in a case where the expert’s range had been £25,000 to £35,000. Importantly, the judge observed that the legal costs of the dispute were likely to have exceeded the gap between the parties’ rival positions on valuation. As a result, the case illustrates that the court is increasingly impatient with disproportionate valuation litigation in family business cases.

13. Re ICamera Ltd; McCrum v Wilson and others [2021] EWHC 1762 (Ch)

Specifically, Re ICamera is a recent example of how the court approaches valuation in a quasi-partnership where the petitioner’s exclusion from management has occurred. Importantly, the case is useful for understanding how the court handles the practical issues that arise when a closely-held family business has reached the point of dispute.

14. Re Planet Organic Ltd [2000] BCC 610

By contrast, Re Planet Organic is a useful authority on the issue of when a company can be ordered to buy its own shares as the remedy in an unfair prejudice case. Specifically, Jacob J considered the practical question of whether the respondents could fund a buyout or whether the company itself should be required to do so. As a result, the case is regularly cited where personal funding for a buyout is an issue.

15. Re Scitec Group Ltd (Sethi v Patel) [2011] 1 BCLC 277

Specifically, Re Scitec Group is an example of the principles being applied to a more substantial business. The court considered the application of the quasi-partnership doctrine and the appropriate valuation methodology. Importantly, the case demonstrates that the principles developed in the earlier authorities continue to apply in larger and more complex cases.

Conduct of the petitioner and procedural matters

16. Shah v Shah [2010] EWHC 313 (Ch) and [2011] EWHC 1902 (Ch)

By contrast, Shah v Shah is a significant authority on the conduct of family business unfair prejudice cases. Specifically, the case was decided in two parts: the liability judgment in 2010 and the valuation judgment in 2011. Importantly, the case illustrates how the court approaches both the substantive question of unfair prejudice and the consequential question of valuation in a family business dispute.

17. Wann v Birkinshaw [2017] EWCA Civ 84

Specifically, Wann v Birkinshaw is a useful authority on procedural matters in unfair prejudice petitions. The Court of Appeal considered issues that frequently arise in the conduct of family business disputes. As a result, the case is regularly cited on procedural questions.

18. Chilukuri v RP Explorer Master Fund [2013] EWCA Civ 1307

By contrast, Chilukuri is the leading authority on costs in unfair prejudice cases where settlement has been offered. Specifically, the Court of Appeal considered the cost consequences of unreasonable refusals to settle. Importantly, the case is relevant to the strategic question of when to make and accept Part 36 offers in family business disputes.

19. ESO Capital Luxembourg Holdings II SARL v GSA Invest Management SA [2017] EWHC 1351 (Ch)

Specifically, this case considered issues of derivative claims and the relationship between section 994 petitions and derivative actions. As a result, the case is useful for understanding the strategic choice between the two routes in family business cases involving wrongs done to the company itself.

Related family law claims

20. Thorner v Major [2009] UKHL 18

By contrast, Thorner v Major is one of the leading modern authorities on proprietary estoppel. The House of Lords confirmed that an informal assurance about future inheritance, relied on by the claimant over many years to their detriment, can give rise to a binding equity. Specifically, the case concerned a farm worker who had worked on his cousin’s farm for many years on the strength of repeated indications that he would inherit it. As a result, the case is the standard authority on proprietary estoppel in family business and farming cases.

21. Gillett v Holt [2001] Ch 210

Specifically, Gillett v Holt is the modern Court of Appeal authority on proprietary estoppel. The case concerned a farm worker who had been promised the farm by his employer over many years. Importantly, the Court of Appeal made clear that proprietary estoppel is a flexible remedy that can give effect to informal promises in a family business context. As a result, the case is regularly cited in family business succession disputes.

22. Guest v Guest [2022] UKSC 27

By contrast, Guest v Guest is the most recent Supreme Court authority on proprietary estoppel and the appropriate remedy. Specifically, the case concerned a farming family where the son had been promised the farm but the relationship broke down before the parents’ death. Importantly, the Supreme Court considered the right way to assess the remedy in proprietary estoppel cases. As a result, the case is now the leading modern authority on the question of what relief should be granted where proprietary estoppel is established. Crucially, this is particularly important in family business succession cases where promises were made about future inheritance. For more, see the legal framework for family business disputes.

23. Dean v Prince [1954] Ch 409

Specifically, Dean v Prince is the classic authority on the role of expert valuers in private company share valuation. The Court of Appeal considered the principles that apply when an expert valuer is appointed to value shares. Importantly, the case remains the foundational authority on how the court approaches challenges to expert valuations.

The modern mediation framework

24. Halsey v Milton Keynes General NHS Trust [2004] EWCA Civ 576

By contrast, Halsey was the original Court of Appeal authority on whether the court could require parties to engage in alternative dispute resolution. Specifically, the Court of Appeal in 2004 held that the court could not compel parties to mediate. Importantly, the case was the starting point for the modern law on mediation and costs.

25. Churchill v Merthyr Tydfil County Borough Council [2023] EWCA Civ 1416

Crucially, Churchill v Merthyr Tydfil is the most recent and most important authority on mediation. The Court of Appeal overruled Halsey on the question of whether the court can compel parties to engage in non-court dispute resolution. Specifically, the court confirmed that it has the power to stay proceedings and order the parties to engage in mediation where it would be just and proportionate to do so. As a result, parties who refuse to engage in mediation now risk significant costs penalties and procedural sanctions. Importantly, this is particularly significant for family business disputes, where the court is increasingly likely to direct mediation at an early stage. For more, see why mediation is usually the right starting point.

How these cases interact

Importantly, the cases on this page are not isolated. Specifically, they form an integrated framework. As a result, family business disputes are usually argued by reference to several of these cases together. For example, an unfair prejudice petition will often involve O’Neill v Phillips on the test for unfair prejudice, Ebrahimi and Bird Precision Bellows on quasi-partnership and the no-discount rule, Sam Weller on the have and have-not pattern, and Profinance Trust on the valuation date. Crucially, the practical legal strategy in any family business case typically rests on the interaction between these cases rather than on any one of them in isolation.

What these cases tell family business owners

By contrast, family business owners can draw several practical lessons from the case law. Specifically, the most important are these.

First, the courts will protect minority shareholders in family businesses through the unfair prejudice route. Importantly, the protection is real, and the remedies are wide. Second, the quasi-partnership doctrine is the most important concept in family business law. Specifically, whether a company is a quasi-partnership often determines the outcome of the dispute. Third, the have and have-not pattern is well established as unfair prejudice. Crucially, paying yourself generously while keeping non-working family members on minimal dividends is a recipe for an unfair prejudice claim. Fourth, the conduct of the petitioner matters. Importantly, even a strong case can be undermined by the petitioner’s own behaviour. Fifth, valuation in family business disputes is a matter for the court’s discretion. As a result, the legal arguments about valuation are often as important as the accounting evidence. Finally, mediation is now effectively required. Specifically, after Churchill, parties who refuse to engage in mediation can expect costs sanctions.

Why case law matters for family business owners

Crucially, family business owners often ask why they need to know about case law. Specifically, they take the view that the cases are matters for lawyers rather than for the family business owners themselves. Importantly, this is partly right but partly wrong. By contrast, while the family business owner does not need to know the detail of every case, they benefit significantly from knowing the names of the leading cases, what they decided in general terms, and how the law has developed.

In practice, the benefits of this knowledge include the following. First, the ability to engage with legal advice more effectively. Specifically, the family business owner who has heard of Ebrahimi, O’Neill v Phillips and Sam Weller can hold a more productive conversation with their barrister. Second, the ability to take legal advice more cheaply. Importantly, time spent explaining the basic framework can be saved where the client already has a high-level understanding. Third, the ability to assess what is being said by other lawyers. Specifically, where the family is receiving advice from multiple sources, having a basic familiarity with the case law allows the family to compare the advice being received. Fourth, the ability to make better strategic decisions. Crucially, family business owners who understand how the law has developed can make more informed choices about when to litigate, when to mediate, and what to invest in prevention.

Frequently asked questions

What is the most important family business case?

In short, there is no single most important case, but Ebrahimi v Westbourne Galleries Ltd [1973] AC 360 is the foundational authority on quasi-partnership and remains the starting point for any family business analysis. Specifically, the case established the three indicators of quasi-partnership and confirmed that the courts will look behind the corporate form to the underlying relationship between the parties. As a result, almost every family business case decided since Ebrahimi builds on its principles in some way.

Which case sets out the test for unfair prejudice?

Typically, O’Neill v Phillips [1999] 1 WLR 1092 is the modern authority on the test for unfair prejudice. Specifically, Lord Hoffmann set out the framework that the courts apply today. Importantly, the question is whether the conduct complained of departs from the terms on which the parties agreed the company would operate, including any legitimate expectations that flowed from those terms.

Does a minority shareholder always get a discount on valuation?

It depends. Specifically, in a quasi-partnership case the court usually values the shares without applying a minority discount: see Re Bird Precision Bellows Ltd [1986] Ch 658. By contrast, in a non-quasi-partnership case a minority discount usually applies: see Strahan v Wilcock [2006] EWCA Civ 13. Importantly, the petitioner’s own conduct can also affect whether a discount applies, as in Davies v Lynch-Smith [2018] EWHC 2336 (Ch).

Can the court require parties to mediate?

Yes. Specifically, the Court of Appeal in Churchill v Merthyr Tydfil County Borough Council [2023] EWCA Civ 1416 confirmed that the court has the power to stay proceedings and order the parties to engage in non-court dispute resolution. Importantly, the case overruled the previous authority of Halsey v Milton Keynes General NHS Trust [2004] EWCA Civ 576 on this point. As a result, parties who refuse to engage in mediation risk significant costs penalties.

What about cases where a family member was promised a share of the business?

Specifically, the leading authorities on proprietary estoppel in the family business context are Thorner v Major [2009] UKHL 18, Gillett v Holt [2001] Ch 210 and Guest v Guest [2022] UKSC 27. Importantly, the doctrine can give effect to informal promises where the person relied on the promise to their detriment. As a result, family members who have worked in the family business for years on the strength of a promise that was not honoured may have a remedy.

Get advice on your situation

The case law on family business disputes is complex and continually developing. Specifically, the right legal strategy in any particular case depends on which of these authorities applies most directly to the facts. As a result, early specialist advice is one of the most valuable investments you can make. I act as a direct access barrister, commercial mediator and mediation advocate in family business disputes throughout England and Wales.

Call 020 4538 0246, use the contact form, or book a call directly. In addition, my book Winning in Family Business Disputes (forthcoming) covers the leading case law in detail, alongside my published works on shareholder disputes and commercial mediation. Organisations like Family Business United also publish useful guidance for family business owners.

Important disclaimer: This page is provided for general information purposes only and does not constitute legal advice. The content may not be legally accurate for your situation or at all. You must not rely on anything on this page in respect of your legal rights. Before taking or refraining from taking any legal action, you should seek advice from a qualified lawyer. I disclaim any and all liability for any loss, damage or expense howsoever caused by reliance on the contents of this page. If you would like advice on your specific situation, contact me here.

The Twenty-Five Most Important Family Business Cases in England and Wales