Extrinsic Evidence in Will Interpretation: AJA 1982 s21
Courts can look outside a will to understand its meaning where the language is meaningless, ambiguous on its face, or latently ambiguous — including direct evidence of the testator's intention. Section 21 Administration of Justice Act 1982 removed the old bar on patent ambiguities.
When Extrinsic Evidence Is Admissible
s21(1) ground: Will is meaningless
Example: Gift to 'my old friend Henry' — testator had no friend of that name
Evidence admitted: Evidence of who the testator intended; correspondence; instructions to will drafter
s21(1) ground: Ambiguous on the face of the will
Example: Gift of 'my car' where testator owned three cars
Evidence admitted: Evidence of which specific asset the testator intended
s21(1) ground: Latent ambiguity (ambiguous when applied to facts)
Example: Gift to 'nephew John' where testator had two nephews called John
Evidence admitted: Evidence identifying which John; relationship; correspondence about intention
Frequently Asked Questions
What is the general rule about interpreting a will in England and Wales?
The starting point is the plain meaning rule: a will is interpreted by giving words their ordinary, grammatical meaning. Courts read the will as a whole and try to give effect to every provision. Before the Administration of Justice Act 1982, the strict position was that evidence outside the will (extrinsic evidence) was not admissible to interpret it — the court read the words on the page in light of the background facts (using the 'armchair principle') but could not look at what the testator actually said or wrote outside the will. Section 21 AJA 1982 changed this by expressly permitting extrinsic evidence, including evidence of the testator's intention, in defined circumstances.
When does s21 Administration of Justice Act 1982 allow extrinsic evidence?
Section 21(1) AJA 1982 provides that extrinsic evidence, including evidence of the testator's intention, is admissible to assist in the interpretation of a will in so far as: (a) any part of the will is meaningless — for example, a gift to 'my friend Margaret' when the testator had no friend of that name; (b) the language of the will is ambiguous on its face — for example, 'I give my car' when the testator owns three cars; or (c) evidence is available as to the circumstances in which the will was made and the language of the will, read in the light of those circumstances, is ambiguous. This third limb covers latent ambiguities — cases where the words are clear on their face but become ambiguous when applied to specific facts.
What is the difference between a patent ambiguity and a latent ambiguity?
A patent ambiguity is apparent on the face of the will — for example, a gift to 'my nephew John or James' (unclear which) or a blank in the will. A latent ambiguity becomes apparent only when the will is applied to external facts — for example, a gift to 'my nephew John' when the testator has two nephews both called John. Before AJA 1982, extrinsic evidence was admissible to resolve latent ambiguities but not patent ambiguities (because the patent ambiguity showed the testator had not formed a clear intention). AJA 1982 s21 removed this distinction: both types of ambiguity can now be resolved using extrinsic evidence, including direct evidence of what the testator intended. The court still cannot rewrite the will — it can only use extrinsic evidence to identify what meaning was intended.
What is the 'armchair principle' and how does it differ from s21?
The armchair principle (derived from cases such as Boyes v Cook (1880) and Re Horrocks [1939]) allows a court to put itself in the position of the testator — knowing what the testator knew at the time they made the will — in order to understand the meaning of the words they used. This means the court can consider: the testator's family situation; the identity of people referred to by descriptions rather than names; the property the testator owned; and the circumstances at the date of the will. The armchair principle is different from the s21 AJA 1982 extrinsic evidence rule. The armchair principle does not permit direct evidence of the testator's stated intentions (conversations, letters) — it only allows the court to know the background facts. Section 21 goes further: it allows direct evidence of intention where the will is ambiguous or meaningless.
What types of extrinsic evidence can be admitted under s21 AJA 1982?
Where s21(1) applies, the extrinsic evidence that can be admitted includes: draft wills showing changes made before the final version; written instructions given to the will drafter or solicitor; correspondence between the testator and their solicitor or will drafter about the provisions; statements made by the testator (to family, advisers, or in letters) about their wishes; evidence of the relationship between the testator and potential beneficiaries. The evidence must be relevant to the ambiguity or meaningless provision being interpreted — it cannot be used to discover a general intention not expressed in the will at all, or to substitute the testator's wishes for what they actually wrote. The court is still limited to finding the meaning of the words used; it cannot use s21 to write a new provision into the will.
Clear Drafting Avoids Interpretation Disputes
Ambiguity in a will leads to disputes and legal costs. The WillSafe kit guides you through clear, precise drafting for England and Wales from £19.97.