What’s happening at the SFO and why UK investigations feel different in 2026

The UK’s corporate investigations climate began 2026 with a sense of prosecutorial momentum. For corporates, the practical implication is not panic, but planning: faster-moving early engagement, a disciplined approach to compliance, and readiness for the new Failure to Prevent Fraud offence. This article examines why UK corporate investigations feel different in 2026, using the UK’s Serious Fraud Office (“SFO”) as the central lens. It argues that the SFO entered the year with a renewed emphasis on pace, visible operational activity and clearer expectations of corporate cooperation.

The article focuses on what that means in practice for corporates: earlier triage, robust decision-making on self-reporting and cooperation, and a greater need for internal investigations to stand up not only as fact-finding exercises but also as evidence of governance, control effectiveness and remediation.
It also explains why the Failure to Prevent Fraud offence – and the proposed extension of senior manager attribution beyond economic crime – changes internal conversations, without turning the piece into a wider survey of every UK reform. The aim is practical: to show how the SFO’s recent trajectory, and the uncertainty around its next phase, is reshaping expectations for companies managing fraud, corruption and internal investigations in the UK.

Key takeaways:
* Momentum, then disruption – the SFO entered 2026 projecting pace and proactivity, but the Director, Nick Ephgrave, will retire at the end of March 2026. On 26 February 2026, the UK Government announced that Graham McNulty had been appointed Interim Director, with his first day set for 6 April 2026.
* Disclosure is back in the foreground – on 12 February 2026, the SFO disclosed a further issue with its legacy Autonomy e‑disclosure system, stating that it may have affected approximately 20 cases and that further reviews are underway.
* A reminder of fragility – also on the same day, the SFO closed the London Mining prosecution, telling the court it was no longer proceeding after concluding that there was no realistic prospect of conviction, citing factors including trial delay, difficulties obtaining and reviewing material and witness-related challenges.
* The legal baseline is strengthening – Failure to Prevent Fraud is already changing internal decision-making; and the UK Government’s Crime and Policing Bill proposes extending the “senior manager” attribution model (beyond economic crime) to all offences if enacted.
* The practical response – treat 2026 as a year for bolstering internal procedures.