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MI5 Admits Providing Evidence Based on Lies in Neo-Nazi Informant Case

MI5 admitted to the High Court that it provided false evidence regarding its secrecy policies to protect a violent neo-Nazi informant.

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Published September 18, 2026 at 1:42 PM EDT

The short answer

MI5 admitted to the High Court that it provided false evidence regarding its secrecy policies to protect a violent neo-Nazi informant. The British security service, MI5, has admitted to providing evidence based on lies to three separate courts while defending a neo-Nazi informant.

MI5 Admits Providing Evidence Based on Lies in Neo-Nazi Informant Case

The Facts

Who
MI5, Timothy Otty KC, Sir John Goldring, Lady Chief Justice Baroness Sue Carr
What
MI5 admitted to the High Court that it gave evidence based on lies to three courts.
When
Friday
Where
High Court in London
Why
To address findings that senior officers were dishonest in court to maintain secrecy regarding a violent informant.

The British security service, MI5, has admitted to providing evidence based on lies to three separate courts while defending a neo-Nazi informant. During a High Court hearing in London, legal representation for MI5 stated the agency accepts without reservation the findings of a report by Sir John Goldring, which concluded senior officers were repeatedly dishonest. The admission follows a 2025 report that detailed how the agency provided false testimony regarding its adherence to secrecy protocols.

The case involves an informant known as Agent X, who was used for intelligence work despite being under police investigation for domestic abuse. A woman known as Beth, who was a partner of the agent, sued the agency after she was attacked with a machete. During previous legal proceedings, MI5 argued that it must keep certain information secret because it had strictly followed its 'neither confirm nor deny' (NCND) policy regarding the man's status. However, the Goldring report found that MI5 had previously disclosed his status in 2020 during phone calls intended to discourage a journalist from investigating the informant.

Sir John Goldring’s investigation identified "serious and systemic failures" within the agency. The report found that a senior officer, identified as Officer 2, lied repeatedly, while another, Officer 3, misled colleagues and provided false information. Timothy Otty KC, representing MI5, told the court that the agency is undergoing a reform program under Director General Sir Ken McCallum. He noted that Officer 2 has resigned and Officer 3 has been suspended pending disciplinary action. Lawyers for the two officers apologized for the conduct but denied that their clients acted with deliberate dishonesty.

The scale of the impact involves the integrity of evidence provided by the United Kingdom’s domestic counter-intelligence agency across three distinct court proceedings. While the number of individuals directly impacted in this specific case is small, the Goldring report found the failures were "systemic" rather than the result of a single individual. The admission follows years of litigation, including a 2022 government attempt to block investigation into the agent and a series of inquiries in 2024 and 2025. The High Court ultimately rejected initial internal MI5 inquiries as having "serious procedural deficiencies" that could not be relied upon, leading to the Prime Minister ordering the Goldring investigation in September 2025.

The outcome of this case could set a precedent for how the government is held accountable for providing false evidence in court. A panel of three senior judges, including Lady Chief Justice Baroness Sue Carr, is currently deciding whether to initiate contempt of court proceedings against MI5 or the individual officers involved. Such a move would be unprecedented for the agency. Lawyers for the BBC and the claimant argue that contempt proceedings are necessary to address what they described as an affront to the administration of justice. A judgment on whether to proceed with these charges will be issued by the High Court at a later, unspecified date.

Timeline of what happened

Key dates and decisions, in the order they occurred.

  1. 2020

    MI5 discloses agent status in phone calls to a journalist

  2. 2022

    Government unsuccessfully seeks to block investigation into Agent X

  3. 2024

    High Court reviews initial ruling following a challenge by the victim

  4. February 12, 2024

    BBC publishes report exposing MI5 lies about informant status

  5. July 16, 2024

    Report released stating MI5 court evidence was based on lies

  6. February 2025

    MI5 initially denies allegations of lying revealed by the BBC

  7. July 2025

    High Court rules MI5 internal investigations are unreliable

  8. September 2025

    Prime Minister orders investigation by Sir John Goldring

Summaries are written by The Plain Record to state the facts of a story plainly and without political slant. Drafted with AI assistance and checked against the source record before publication. See how we report, or report a correction.

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Questions readers ask

What happened: MI5 Admits Providing Evidence Based on Lies in Neo-Nazi Informant Case?

MI5 admitted to the High Court that it gave evidence based on lies to three courts.

Who is involved?

MI5, Timothy Otty KC, Sir John Goldring, Lady Chief Justice Baroness Sue Carr

When did this happen?

Friday

Where did this happen?

High Court in London

Why does this matter?

To address findings that senior officers were dishonest in court to maintain secrecy regarding a violent informant.