Brinner v Brinner: when the family business heir cannot be executor

Most people choose their executor with their heart. The eldest son who already runs the business. The daughter who handles the rental portfolio day to day. It feels natural — they know the assets, they know the people, and they will get on with it. In June 2026 the High Court showed what can happen when that natural choice collides with a question nobody wants to ask: who actually owns what?

The case is Brinner v Brinner & Ors [2026] EWHC 1462 (Ch), decided by Deputy Master Valentine in the Business and Property Courts in London and handed down on 16 June 2026. It is not a story of fraud or proven wrongdoing. It is a story of a family property business, an executor with a foot in both camps, and paperwork that did not tell a clear enough story. For anyone who owns a company alongside their children, it is well worth ten minutes.

What happened

Mr Brinner died in August 2024. He was a businessman with interests in property. His Will, made with professional advice in 2016, appointed his eldest son as sole executor, left his widow a legacy of £350,000 and divided the residue equally between his eight children from his first marriage. He had also signed a later document in Hebrew in 2020, but both sides accepted it was not a valid Will for English law purposes, so the 2016 Will governed.

The estate was valued for inheritance tax at just under £1 million — his half of the family home, a flat abroad, some cash and a single share in a family holding company, valued at £1. His widow was surprised. She believed the estate should be far larger, because over the years her husband had been involved in several property companies whose shares were now registered in the names of his son and others. One of those companies, according to its published accounts, held net assets of over £15 million.

Her case was that her husband had kept a beneficial interest in some of those companies — that the people named on the share register were, at least in part, holding for him. Emails from 2016 appeared to treat him as a 40% owner of one company. Companies House filings had listed him as a person with significant control of another. The son said those interests had been given up years earlier in a family restructuring and that the filings were an error. But he was the legal owner of the very shares in question, and his solicitors told the widow he would not be answering further questions.

She applied under section 50 of the Administration of Justice Act 1985 to have him replaced by an independent professional administrator.

What the court decided — and why

The court removed the son as executor and ordered that the administration be completed by an independent third party. The judge described it as “finely balanced”, and several points in the reasoning matter for business owners.

• No misconduct needed. The court does not have to find that an executor has done anything wrong. The test is whether the estate is being properly administered and what is in the interests of the beneficiaries as a whole.
• A “good arguable case” is enough. The widow did not have to prove the missing assets existed. The judge called her evidence “thin”, but found there was a good arguable case that at least some interests needed investigating — including a legal point that any transfer of her husband’s interest in one company may not have been effective, because disposing of a beneficial interest generally requires signed writing under section 53(1)(c) of the Law of Property Act 1925.
• The conflict was the heart of it. If the estate turned out to own more, the son would personally lose out. As the judge put it, it was not proper that he “should be the person charged with determining whether it is worthwhile to pursue the claims against himself.”
• The father’s choice and the family’s wishes were not decisive. Most of the children wanted their brother to stay. The court took that into account, but noted that some of them were themselves conflicted and beneficiaries “cannot demand he stay in post if that is not compatible with the proper administration of the estate.”
• Hostility alone is not enough — but it counts. Letters accusing the widow of bringing “shame” on the family, and pressure to settle matters outside the English courts, persuaded the judge that the son could struggle to act neutrally in any litigation with her.

The court also rejected parts of the widow’s case. It held that the £1 share had been deliberately designed to carry income during her husband’s lifetime and little value after his death, so failing to extract more from it was not poor administration. And it held that her interest under the Will was the fixed £350,000 legacy, not a wider discretionary income.

Why this matters for family business owners and property investors

Strip away the particular family and the case describes a very ordinary pattern. A parent builds a business. Over the years, shares are moved to the next generation — sometimes formally, sometimes on a handshake. The child most involved in the business is the obvious executor. And after the death, someone outside that inner circle — a second spouse, a sibling who never worked in the firm — looks at the estate valuation and asks where everything went.

An illustration

Take a Sussex couple — call them Richard and Helen, invented purely for illustration. Richard, 68, built a property letting company over thirty years. Ten years ago he moved most of the shares to his son Tom, who now runs it, but kept voting control “until he is ready”. Nothing was written down about whether the transfer was outright or whether Tom was, in effect, holding some shares for his father. Richard’s Will appoints Tom as sole executor and leaves everything between his three children, with a legacy for Helen, his second wife.

On Richard’s death, Helen and Tom’s sister both want to know whether some of the company’s value belongs in the estate. Tom genuinely believes it does not. But he is the only person with the full records, the person who benefits if the answer is “no”, and the person deciding whether to look. Even if Tom is entirely honest, that is precisely the position the court in Brinner found unsustainable. The result can be an application to court, an independent administrator whose fees come out of the estate, and a family that no longer speaks.

The traps

• Informal transfers of shares or property. A beneficial interest that has been “given up” only in conversation is an invitation to argument. The legal owner on the register and the person who really benefits can be different people, and the law generally expects signed writing when a beneficial interest is disposed of.
• Records that contradict each other. Companies House filings, company accounts, emails to lenders and the Will should tell the same story. In Brinner, a lender was told the company was “owned by me” at a time when the shares were registered elsewhere.
• A sole executor who is also a counterparty. Where the executor co-owns the business, is buying the parent out, or holds assets the estate might claim, the conflict is built in from day one.
• Two documents pointing different ways. The Hebrew document in Brinner was not a valid English Will, yet it drove much of the dispute. One clear, properly executed Will covering your assets avoids that confusion.
• Assuming Business Relief will tidy things up. Business Relief can remove qualifying trading company shares from the inheritance tax bill, subject to the £2.5 million combined cap with Agricultural Property Relief from April 2026 and 50% relief above it. But companies whose business is mainly holding or letting property generally do not qualify, and relief cannot help if nobody agrees what the estate owns in the first place.

What to do

For the great majority of families, appointing a trusted son or daughter as executor is exactly right, and nothing in this judgment changes that. The lesson is narrower: where an executor is also a co-owner, a business successor or the legal holder of assets that have moved between generations, it pays to plan for the questions others may ask.

• Put transfers in writing. If shares or property have passed to children, record whether it was an outright gift, a sale or something else, and when. If someone is holding assets for you, a signed declaration of trust says so clearly.
• Keep the public record accurate. Make sure Companies House filings — particularly persons with significant control — match the real position.
• Think about the balance of your executors. Where the natural executor has a personal stake in the business, appointing a second executor alongside them — another family member or a professional — can protect them as much as anyone else. They are not left marking their own homework.
• Review your Will when the business changes. A restructuring, a share transfer or a new marriage is the moment to check that the Will and the company paperwork still fit together.
• Keep one clear Will for your estate. Where there is property overseas, a UK Will can deal with it, including with an express election for the law of England and Wales under the EU Succession Regulation (Brussels IV) where European property is involved.

A short close

Mr Brinner chose his eldest son for good reasons, and the court made no finding that the son had acted dishonestly. The estate still ended up in the hands of a stranger, because the paperwork left a question only a conflicted executor could answer. Clear records and a well-balanced choice of executors are the simplest way to make sure the people you trust are able to do the job you have asked of them.

If you own a business or property portfolio alongside your children and would like to talk through how your Will and your company arrangements fit together, book a Discovery Call. It takes 30 minutes, the fee is £30, and it is credited against your fees if you go on to instruct us.