The twin regulatory drives mark the first serious attempt to hold individual legal practitioners to account for their roles in what became one of the worst miscarriages of justice in British legal history. More than 900 sub-postmasters were wrongly prosecuted for theft and fraud between 1999 and 2015, owing to bugs in Fujitsu's Horizon accounting software. For businesses that routinely outsource high-stakes litigation and regulatory work to external counsel, the outcomes will sharpen expectations around duty of candour and personal liability.
What the BSB and SRA investigations cover
The Bar Standards Board (BSB), which oversees more than 18,000 barristers in England and Wales, confirmed in late April 2026 that its ten live investigations are "progressing" and that it "will take enforcement action" where necessary, according to a BSB spokesperson quoted by City A.M. The regulator is also "finalising the consideration" of 111 cases in which sub-postmasters had criminal convictions overturned by the Court of Appeal, to "ensure that all proportionate areas of investigation have been identified and assessed," the spokesperson said.
Separately, the Solicitors Regulation Authority (SRA) disclosed in March 2026 that its 20 investigations include "serious allegations of solicitors acting with a lack of integrity" across several areas, as reported by City A.M. The SRA's probe focuses on solicitors' management and supervision of the Post Office's case, and on the conduct of the litigation and wrongful prosecutions of sub-postmasters.
"We are progressing our investigations as swiftly as possible. It is vital we follow due process and get this right. We owe that to everyone impacted by this scandal, as well as the wider public."
Those were the words of Jonathan Peddie of the SRA, speaking in March 2026, as quoted by City A.M.
Which firms and practitioners are in scope
Neither regulator has publicly named the individuals under investigation. The BSB has not confirmed how many barristers are covered by its ten cases, and the SRA has likewise withheld names.
What is known is the roster of firms that advised the Post Office over the relevant period. Herbert Smith Freehills and Womble Bond Dickinson are the most prominent, having advised on the Horizon IT scandal and related litigation, according to City A.M. Burges Salmon and Fieldfisher were appointed to represent the Post Office during the ongoing public inquiry led by Sir Wyn Williams, which completed its hearings in December 2024.
In January 2025, MPs called for transparency over the legal fees earned by City firms advising the Post Office, noting that many victims were still awaiting compensation payouts at the time, City A.M. reported. The total sums paid to external counsel have not been fully disclosed.
What the probes mean for businesses that instruct external counsel
The Horizon affair is an extreme case, but the governance questions it raises are not. Any organisation that delegates regulatory strategy, internal investigations, or contested litigation to outside lawyers faces a version of the same risk: that the advisers it trusts may prioritise case tactics over candour, or fail to flag material weaknesses in the evidence.
Three practical implications stand out for operators and boards.
Oversight cannot be fully outsourced
The SRA's focus on "management and supervision" of the Post Office's litigation suggests that how a client monitors its lawyers, not just which lawyers it hires, will be scrutinised. Boards and general counsel functions need documented processes for reviewing external legal advice, particularly where that advice underpins enforcement action against individuals.
Individual liability is real
The BSB's decision to pursue cases to its Independent Decision Making Body means individual barristers could face sanctions ranging from fines to disbarment. For businesses, this reinforces the importance of due diligence on named practitioners, not just the brand of the firm on the engagement letter.
Duty of candour is hardening
If disciplinary findings confirm that lawyers failed to disclose known flaws in the Horizon evidence, the precedent will raise the bar for candour obligations across the profession. Firms instructing external counsel on contentious matters should expect tighter regulatory standards on disclosure and transparency in the years ahead.
Timeline: when disciplinary outcomes are expected
The BSB expects its cases to reach the Independent Decision Making Body by the end of 2026, according to its April statement. The SRA has not given a comparable deadline for its 20 investigations.
Sir Wyn Williams's final inquiry report, originally anticipated in 2025, is now expected later this year, according to City A.M. That report could trigger further regulatory or legislative action affecting professional standards across the legal sector.
The inquiry's conclusions, combined with the BSB and SRA outcomes, will likely shape the next wave of reform. For the 900-plus sub-postmasters whose lives were upended, and for the legal profession's credibility, the stakes could hardly be higher.
