Cases

Langham v Veltema: Why 'They Accepted My Tax Return' Won't Stop a Discovery Assessment

You filed your return, disclosed everything, and heard nothing—then years later a discovery assessment arrives. Langham v Veltema explains the 'hypothetical officer' test, why silence isn't protection, and how to disclose so HMRC can't reopen your year.

Liam Williams

Liam Williams

— 14 min read
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You filed your return. You put down the figures honestly. The deadline for HMRC to open an enquiry came and went in silence. As far as you were concerned, that year was closed.

Then, years later, a brown envelope arrives with a discovery assessment inside—HMRC reopening the very year you thought was settled, asking for tax you had no idea was in dispute. Your first reaction is indignant disbelief. I told them everything. They had my return and said nothing. How is this even allowed?

Here is the honest answer up front: yes, usually it is allowed. An officer who accepts your return without opening an enquiry does not, by that silence alone, protect you. The one defence you genuinely control is narrow, and it is the subject of the most important case in this area—Langham v Veltema. This article explains what that defence is, why it is so easy to overestimate, and what you can do to make it work for you.

What Langham v Veltema Was About

Mr Frederick Veltema was the sole director and employee of British Horticultural Company Limited, which he owned jointly with his wife. In the tax year ended 5 April 1998, the company conveyed to him—for no money—a house near King's Lynn that he had been occupying. Because he received it as a director, the transfer was a benefit in kind—a perk taxed as if it were salary—charged on the open market value of the property at the date of transfer.

The company had a written surveyor's valuation of £105,000, and around the time of the transfer the surveyors advised that the value was "nearer to £100,000 than £105,000". On 30 July 1998 Mr Veltema's accountants filed his return and self-assessment, declaring the benefit at £100,000. The return did not spell out exactly what the asset was—but there was no requirement or space to do so, and HMRC accepted that Mr Veltema had disclosed all the relevant information. The relevant Inspector also had the company's P11D form (sent in by the company) sitting on his desk, showing the same £100,000 figure, while he worked through the self-assessment.

The 12-month window for HMRC to open an enquiry into Mr Veltema's personal return closed on 31 January 2000. No enquiry was opened. Only afterwards did the picture change. The company's tax affairs were being looked at separately, and on 19 January 2000 the District Valuer reported an open market value of £160,000. The company and HMRC eventually agreed a figure of £145,000—£45,000 more than Mr Veltema had declared. By the time this filtered back to the Inspector dealing with Mr Veltema's personal return, around June 2000, the enquiry window had long shut.

Too late for an enquiry, the Inspector turned to the only tool left: a discovery assessment under section 29 of the Taxes Management Act 1970. On 13 November 2000 he raised an £18,000 assessment—roughly the tax on the extra £45,000 of value.

The case ran through three levels. The General Commissioners allowed Mr Veltema's appeal, reasoning that the Inspector should have realised the £100,000 valuation would be scrutinised and could have raised it before the window closed. The High Court (Park J) agreed. But the Court of Appeal—Lord Justice Auld giving the leading judgment, with Lord Justice Chadwick and Lady Justice Arden—reversed both. The Inspector won. The £18,000 discovery assessment was restored. The taxpayer lost.

That outcome is the whole point of the case, and it is why "they accepted my return and said nothing" is not, on its own, a defence.

The Question The Court Answered

The appeal turned on the condition in section 29(5) TMA 1970. When a return has been filed, HMRC generally cannot make a discovery assessment unless one of two conditions is met. One concerns careless or deliberate behaviour (more on that later). The other—the one in play here—is that the officer, by the time the enquiry window closed, "could not have been reasonably expected, on the basis of the information made available to him before that time, to be aware of" the insufficiency.

That wording raised two distinct questions:

  1. What does the officer have to be "aware of"? An actual insufficiency in the assessment—as HMRC argued? Or merely circumstances suggesting something might be wrong and worth checking—as Mr Veltema argued, and as Park J had held?

  2. What information counts? Only information that came from the taxpayer (the categories set out in section 29(6))? Or everything in front of the Inspector—including, here, the company's P11D on his desk?

How those two questions are answered decides who wins. The Court of Appeal answered both in HMRC's favour.

Awareness Of An Actual Insufficiency

On the first question, Auld LJ was emphatic. Section 29(5) is concerned with what an officer could be expected to be aware of—not what he could be expected to do. At paragraph 33 he said:

"More particularly, it is plain from the wording of the statutory test in section 29(5) that it is concerned, not with what an Inspector could reasonably have been expected to do, but with what he could have been reasonably expected to be aware of. It speaks of an Inspector's objective awareness, from the information made available to him by the taxpayer, of 'the situation' mentioned in section 29(1), namely an actual insufficiency in the assessment, not an objective awareness that he should do something to check whether there is such an insufficiency, as suggested by Park J. If he is uneasy about the sufficiency of the assessment, he can exercise his power of enquiry under section 9A and is given plenty of time in which to complete it before the discovery provisions of section 29 take effect."

This is the heart of it. The shield does not turn on whether the officer could have checked and found the problem. It turns on whether the information you gave him already made the actual insufficiency apparent. "You should have been suspicious enough to look" is not the test—and that was exactly the reasoning the Court of Appeal rejected.

Auld LJ explained why the law is built this way. Self-assessment is designed for simplicity and early finality. Reading section 29(5) so as to impose an obligation on officers to scrutinise returns that disclose only circumstances "further investigation of which might or might not" reveal a problem would frustrate that aim (paragraph 32). HMRC has no duty to comb through your figures. If an officer is uneasy, the proper response is to open a section 9A enquiry while the window is open—the closure notice at the end of that enquiry is how the year is meant to be examined and settled.

The flip side, which lands hardest on the honest taxpayer, is that an officer who simply accepts your return and lets the window expire has done nothing wrong—and has given up nothing. His silence is not a finding that everything was fine.

"Made Available" Means From You

The second question was about the source of the information. Section 29(6) sets out, in a closed list, what counts as "made available" to the officer. In short, it is information in your return and any accompanying accounts or documents; information in your claims and their accompanying documents; documents you produced during an enquiry; and the existence and relevance of anything that can reasonably be inferred from those, or that you notify to HMRC in writing.

Every category emanates from the taxpayer. That textual fact did the work. Auld LJ held the list to be exhaustive—if Parliament had meant it to be a non-exhaustive set of examples, it would have said the term "includes" those categories. Because it does not, information sitting elsewhere in HMRC—the P11D the company had sent in, which happened to be on the Inspector's desk—did not count as "made available" by the taxpayer. And in any event, the P11D showed only the same £100,000 figure; it did not identify or even hint at an insufficiency.

Auld LJ captured the scheme in the passage that has been quoted ever since, at paragraph 36:

"It seems to me that the key to the scheme is that the Inspector is to be shut out from making a discovery assessment under the section only when the taxpayer or his representatives, in making an honest and accurate return or in responding to a section 9A enquiry, have clearly alerted him to the insufficiency of the assessment, not where the Inspector may have some other information, not normally part of his checks, that may put the sufficiency of the assessment in question. If that other information when seen by the Inspector does cause him to question the assessment, he has the option of making a section 9A enquiry before the discovery provisions of section 29(5) come into play. That scheme is clearly supported by the express identification in section 29(6) only of categories of information emanating from the taxpayer."

Two words in that passage carry enormous weight: "clearly alerted". The shield bites only where your own disclosure clearly alerts the officer to the insufficiency. Knowledge that HMRC holds somewhere—in another office, on another form, in a database—does not protect you, because it is not information you made available within section 29(6). The Supreme Court later endorsed this exact paragraph in HMRC v Tooth when confirming there is no concept of "collective knowledge" across the Revenue: what matters is the information made available to the individual officer.

The Hypothetical Officer

If the test is about what an officer could have been "aware of", which officer are we talking about? Not the actual human being who happened to handle your file—and not a specialist who might have phoned a colleague or pulled a record from another department. The test is objective. It asks what a hypothetical officer of reasonable competence and skill would have been aware of from the section 29(6) information.

The Court of Appeal in Sanderson v HMRC [2016] EWCA Civ 19 pulled the principles together in a five-point summary by Patten LJ at paragraph 17. The officer is a hypothetical officer, not the actual one. He has the characteristics of an officer of general competence, knowledge or skill, including a reasonable knowledge and understanding of the law. What he must be reasonably expected to be aware of is an actual insufficiency—not just grounds for suspicion. And the only information taken into account is the section 29(6) information.

That gloss about the officer's knowledge of the law comes from HMRC v Lansdowne Partners Limited Partnership [2011] EWCA Civ 1578, where the taxpayer won precisely because a competent officer, properly understanding the law, could have spotted the insufficiency from what was disclosed. The hypothetical officer is assumed to bring reasonable legal understanding to the material—a point we return to below, because it cuts in the taxpayer's favour as well as against.

The fullest description of the hypothetical officer's attributes comes from the Upper Tribunal in Charlton v HMRC [2012] UKUT 770 (TCC), which described an officer with "such level of knowledge and understanding that would reasonably be expected in an officer considering the particular information provided by the taxpayer" (paragraph 58). Charlton also confirmed that a "discovery" needs no new fact—an officer who simply changes his mind on the same material can make a discovery (paragraph 37).

The upshot for you: it is no answer to say the particular officer was overworked, or junior, or never looked. The question is what a reasonably competent officer would have realised from what you disclosed.

Disclosing The Figure Is Not Disclosing The Insufficiency

This is the part that catches people out, and it is the most important warning in the case. It is tempting to think: I'll just write everything in the additional-information box on my return, and then HMRC can never reopen the year. Full disclosure of the figures feels like a complete shield. It is not.

The cautionary example is Sanderson itself. Mr Sanderson's return disclosed a chargeable gain of around £1.8 million set against losses of more than £2 million—and he set out the loss claim in the white space, the free-text "additional information" box. The losses came from a marketed avoidance scheme. HMRC later raised a discovery assessment, arguing the loss claim did not work. Despite the white-space disclosure of roughly £2 million, the taxpayer lost. The Court of Appeal held that the disclosure did not make the hypothetical officer aware of the actual insufficiency—that the loss claim was ineffective. Disclosing the numbers is not the same as disclosing that something is wrong.

Contrast Tooth, where the taxpayer's white-space notes spelled out exactly what he was doing and why, leaving no genuine inaccuracy once the return was read as a whole. The difference between Sanderson and Tooth is not whether the taxpayer wrote something in the white space. It is whether what he wrote clearly alerted the officer to the contentious point. Write down the figure and you have disclosed the figure. Write down the figure, the legal point, and the position you have taken, and you have a fighting chance of having disclosed the insufficiency.

There is one genuine sword for the taxpayer here. Even where you have disclosed enough facts, the law may be so complex that a reasonably competent officer still could not have been aware of the insufficiency. Moses LJ left that possibility open in Lansdowne at paragraph 69:

"I wish to leave open the possibility that, even where the taxpayer has disclosed enough factual information, there may be circumstances in which an officer could not reasonably be expected to be aware of an insufficiency by reason of the complexity of the relevant law."

That is a narrow protection, but a real one. If the technical analysis was genuinely difficult, full factual disclosure does not automatically hand HMRC the case.

Is Langham Still Good Law?

Yes. Langham is the foundational Court of Appeal authority on the section 29(5) "made available" condition, and nothing has displaced it. The Supreme Court in Tooth expressly cited Auld LJ's paragraph 36 with approval, and the modern Court of Appeal restated the whole framework in Sanderson. The "hypothetical officer" and "actual insufficiency" tests are alive and well.

It is worth keeping two ideas with the word "staleness" attached firmly apart, because they are often confused:

  • Delay-staleness—the argument that HMRC's discovery can "go stale" if it sits on the discovery too long before assessing. That argument is dead. The Supreme Court rejected it in Tooth: a discovery is an event in time and does not cease to be one with the passage of time.

  • The section 29(5) shield—the "you already told us" defence that Langham established. That is alive. It asks whether your own disclosure made the officer aware of the insufficiency before the window closed.

Our separate analysis of Tooth works through that distinction in detail, so we will not re-argue it here. The short version: Tooth killed the delay argument, left the Langham shield untouched, and approved the paragraph of Langham that defines it.

What This Means For You

If you have just received a discovery assessment for a year you thought was closed, here is how Langham shapes your position—and what you can actually do.

Silence is not protection. An officer accepting your return and letting the enquiry window expire gives you nothing. Do not assume the year is safe just because HMRC went quiet.

An assessment is not an accusation. For an honest, accurate filer, a discovery assessment recovers tax (plus interest)—it is not a penalty and not a finding that you did anything wrong. Mr Veltema himself was in that position: HMRC alleged negligence and lost that point before the Commissioners. And for a taxpayer who took reasonable care, HMRC's reach-back is capped at four years from the end of the tax year—the longer 6- and 20-year limits below need carelessness or worse. The discovery assessments guide has the full time-limit table.

Check what your return actually disclosed. Your section 29(5) defence stands or falls on what you made available—your return, accompanying documents, claims, anything you produced in an enquiry, and what can reasonably be inferred from those. Knowledge HMRC held elsewhere does not count. Read your filed return and any covering letters carefully and ask: would a competent officer, reading only this, have been clearly alerted to the actual problem? If you no longer have a copy, you can view past returns through your HMRC online account or ask HMRC for one.

If the answer is yes, that is the shape of your ground of appeal: identify the specific entries or notes in your return that clearly alerted (or should have alerted) a competent officer to the actual insufficiency, and argue that HMRC cannot satisfy section 29(5). Our guide to writing grounds of appeal shows where this fits.

For next time, disclose the point—not just the number. For any doubtful, valuation-dependent, or law-dependent position, use the "additional information" box—the free-text box near the end of the Self Assessment return (the "Any other information" box online, box 19 on the paper SA100). This is what practitioners call the "white space", and notes there count as information you supplied with the return. HMRC's own Statement of Practice 1 (2006)—published in direct response to this case—suggests stating the underlying facts, who carried out any valuation and whether they were an independent qualified professional, and, where you are relying on a reading of the law that differs from HMRC's published view, saying so. The aim is to write the facts, the legal point, and the position you have taken. This reduces the risk that HMRC can later reopen the year. It is risk-reduction, not a guarantee—remember Sanderson disclosed in the white space and still lost.

Or simply ask HMRC to open an enquiry. Auld LJ pointed to the express alternative: if you are uncertain whether your position will be accepted, you (or your adviser) can invite HMRC to open a section 9A enquiry while the window is open. An enquiry that concludes in your favour gives you the finality that silence does not.

The shield does not help a careless or deliberate taxpayer. Section 29(5) protects the honest, accurate filer. If HMRC instead proves that the lost tax was brought about carelessly or deliberately by you or someone acting on your behalf, the other condition—section 29(4)—is satisfied regardless of what you disclosed, and the time limit can stretch to 6 or 20 years. (At the time of Langham the wording was "fraudulent or negligent conduct"; the current statute, since April 2010, reads "carelessly or deliberately". For what "deliberate" means, see our Tooth analysis; for the regime as a whole, the discovery assessments guide covers the gateways, time limits, and grounds.)

It is a question of fact—win it at the tribunal. Whether the officer "could not reasonably have been expected to be aware" of the insufficiency is a question of fact, decided objectively by the tribunal (Hankinson v HMRC [2011] EWCA Civ 1566). That makes the First-tier Tribunal the place to win this point. An onward appeal to the Upper Tribunal needs an error of law—and "the tribunal asked the wrong question" is exactly such an error, which is precisely what happened in Langham, where the Commissioners and Park J asked what the officer could have done rather than what he could have been aware of.

Know who proves what. HMRC must establish that it can validly make the discovery assessment—the discovery and the section 29(3) gateway. You bear the burden on the amount: under section 50(6) TMA 1970, it is for you to show the assessment is excessive. The hub explains this split in more detail.

If you decide to appeal, you have 30 days from the date of the decision. For the mechanics, see how to appeal to the tax tribunal and writing grounds of appeal. You can also ask HMRC for an internal review before, or instead of, going to tribunal.

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