What Happens When an Inheritance Dispute Begins? A Guide to UK Estate Disputes

July 9, 2026

When an inheritance dispute begins, it can quickly become complex, particularly where high-value estates or family assets are involved. Understanding your legal options early is essential to protect your position and achieve a fair outcome.

This guide explains the causes of inheritance disputes in the UK, the legal grounds for bringing a claim, and how these matters are resolved.

What triggers high-value estate disputes?

Inheritance disputes often arise during emotionally difficult circumstances. They are more likely to escalate where significant wealth or expectations are involved.

Common triggers include unexpected changes to a Will, the exclusion of close family members, or concerns about the deceased’s vulnerability. Disputes can also arise where there are multiple Wills, unclear instructions, or disagreement over valuable assets such as property or business interests.

In high-value estates, even small uncertainties can lead to significant financial consequences. Early legal advice can help clarify your position and reduce the risk of escalation.

What are the legal grounds for challenging a Will or estate?

To challenge a Will in the UK, you must establish recognised legal grounds. These typically fall into two categories: whether the Will is valid and whether it makes fair provision.

A Will may be challenged on the basis that the person making it lacked capacity, was subject to undue influence, or did not fully understand its contents. Issues can also arise if the Will was not properly executed under the Wills Act 1837 or if there are concerns about fraud.

Even where a Will is valid, a separate claim may be brought under the Inheritance (Provision for Family and Dependants) Act 1975. This allows certain individuals, such as spouses, children or financial dependants, to seek reasonable financial provision from the estate.

These claims are subject to strict time limits, usually six months from the grant of probate. Acting promptly is therefore essential.

Navigating mediation and alternative dispute resolution

Many inheritance disputes are resolved without going to court. Alternative dispute resolution, particularly mediation, is often encouraged at an early stage.

Mediation involves an independent party helping those involved reach a negotiated settlement. It can offer a more practical and less adversarial route to resolution.

The benefits are clear. It is usually quicker, more cost-effective and allows for confidential discussions. Importantly, it can help preserve family relationships, which is often a key concern in inheritance disputes.

In high-value cases, mediation can also produce flexible outcomes that a court may not be able to impose.

Court proceedings and litigation strategy for contested estates

If a dispute cannot be resolved through negotiation, court proceedings may be required. These claims are handled within the framework of contentious probate.

The process begins with a detailed investigation of the claim, including gathering evidence such as medical records, financial documents and witness statements. If proceedings are issued, both parties will exchange evidence and may rely on expert reports.

Throughout the process, settlement discussions will usually continue. Only a small number of cases proceed to a full trial, where a judge makes the final decision.

When developing a strategy, it is important to consider the strength of the evidence, the likely legal costs and the impact on the estate. Timing can also be significant, as disputes often delay administration and may affect the value of key assets.

How to protect your interests and preserve family wealth

Inheritance disputes are not just legal issues. They often involve long-term financial and personal consequences.

Taking early advice allows you to understand your position and make informed decisions. It also helps preserve evidence and ensure that any steps taken are strategically sound.

In many cases, a balanced approach is required. This may involve pursuing a claim while remaining open to settlement discussions. Careful handling can help protect family wealth while avoiding unnecessary conflict.

Tax considerations should also be taken into account, particularly in high-value estates where changes to distribution may affect inheritance tax or capital gains tax.

How Herrington Carmichael can help

Our contentious probate team advises on inheritance disputes, including challenging Wills and defending claims, particularly in complex and high-value estates.

If you are involved in a dispute or considering your options, taking early legal advice is key to protecting your position and achieving the best possible outcome. Contact us today to speak to a member of our specialist team.

Mike Pollard
Legal Director, Will, Trust & Estate Disputes
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This reflects the law and market position at the date of publication and is written as a general guide. It does not contain definitive legal advice, which should be sought in relation to a specific matter.

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