Contesting a Will in the UK

Two Distinct Routes for UK Challenges

In England and Wales, challenging a deceased person's estate plan takes one of two separate legal routes, and they're frequently confused.

A validity challenge attacks the will itself — arguing it should be thrown out entirely because the testator lacked mental capacity, was subjected to undue influence, was defrauded, or because the will wasn't properly executed under the Wills Act 1837. A successful validity challenge means the estate is distributed under a prior will or, if none exists, under the intestacy rules.

An Inheritance Act claim under the Inheritance (Provision for Family and Dependants) Act 1975 doesn't challenge the will's validity at all. It accepts the will is genuine but argues it fails to make reasonable financial provision for an eligible dependent. The court can then rewrite the distribution to provide adequate maintenance or, for surviving spouses, provision at the divorce standard.

You can pursue both routes simultaneously, but they have different eligibility rules, different deadlines, and different cost implications.

Validity Challenges: Grounds and Evidence

The grounds for invalidating a will in England and Wales mirror those across the common law world, with some UK-specific applications:

Lack of testamentary capacity. UK courts still apply the Banks v. Goodfellow test from 1870 — the testator must have understood the nature of the will, the extent of their property, the claims of those who would naturally expect to benefit, and must not have been suffering from a disorder of the mind that distorted their judgment. The Mental Capacity Act 2005 provides a complementary framework, and courts often refer to both.

Solicitors who suspect borderline capacity should obtain a "golden rule" medical assessment — a capacity evaluation by an independent doctor at the time of signing. If this assessment exists and supports capacity, challenging the will becomes significantly harder. If it doesn't exist, its absence can work in the challenger's favor.

Undue influence. For a will validity challenge, courts generally require proof of actual undue influence — the challenger must show coercion that overpowered the testator's free will. Legal tests differ by jurisdiction; a relationship of trust and confidence alone does not automatically shift the burden in every jurisdiction.

Lack of knowledge and approval. Even if the testator had capacity, the will is invalid if they didn't know and approve its contents. This ground applies when someone else prepared the will and the testator signed without understanding the specific provisions — particularly relevant in cases involving elderly testators who signed documents presented to them by a beneficiary.

Improper execution. The Wills Act 1837 requires the testator's signature (or a mark made at their direction) witnessed by two people who were present at the same time. Failure to meet these formalities can invalidate the will.

The Caveat System

If you're considering a challenge, one protective step is filing a caveat with the Probate Registry. A caveat prevents the court from issuing a grant of probate; it does not itself freeze estate assets or resolve the dispute.

Filing a caveat costs £3 and can be done online or by post. The caveat lasts six months and can be renewed. It's an administrative step, not a legal claim — you don't need to state your grounds or file evidence.

When the executor becomes aware of the caveat, they can issue a "warning" requiring you to respond within 14 days with an "appearance" — a formal statement that you have a genuine interest in the estate. If you don't respond within 14 days, the caveat can be removed and probate granted. That 14-day window is tight and non-negotiable.

Inheritance Act Claims: The Six-Month Clock

Claims under the 1975 Act must be filed within six months of the grant of probate. Late applications require the court's permission, which is rarely granted once assets have been distributed.

The Act defines eligible applicants and the standard of provision they can claim:

• Surviving spouses and civil partners can claim at the "divorce standard" — whatever they would reasonably have received if the marriage had ended in divorce rather than death. This is the most generous standard.
• Former spouses who haven't remarried can claim for reasonable maintenance.
• Children (including adult children) can claim for reasonable maintenance, though adult children bear a higher burden to show why the provision was inadequate.
• Dependants who were being maintained by the deceased can claim reasonable maintenance.
• Cohabitants who lived with the deceased as a spouse for at least two years before death can claim maintenance.

The Cost Risk in UK Probate Disputes

The UK's "loser pays" rule applies to estate litigation, which makes the financial risk more acute than in the US. If your challenge fails, you may be ordered to pay the estate's legal costs — solicitor fees, barrister fees, expert fees — on top of your own.

Two exceptions provide partial protection:

The court can order costs from the estate when the litigation was caused by the testator's own conduct — ambiguous drafting, suspicious circumstances, or provisions that invite reasonable investigation.

The court can make no order as to costs when the challenger had reasonable grounds, even if the challenge ultimately failed. This doesn't cover your own costs, but it prevents the double penalty of paying the other side's fees as well.

Solicitor fees for UK estate disputes typically run £250–£500 per hour. A case that settles at mediation costs £10,000–£30,000 per side. Trial costs escalate to £50,000–£150,000+. Conditional fee arrangements (no win, no fee) exist for some estate cases but are uncommon.

The Contesting a Will toolkit covers both UK and US procedures, with dedicated sections on the caveat system, the 14-day warning response, and the Inheritance Act claim process.