Tax and Finance Investigations for UK Journalists

The financial transparency landscape

The UK has more public corporate data than most jurisdictions: Companies House is free to search, the Persons with Significant Control (PSC) register mandates beneficial ownership disclosure, and regulatory enforcement decisions from the FCA and FRC are published with substantial detail. The problem is not absence of data — it is connecting it. A person who controls multiple companies via nominees and offshore structures may not appear prominently in any single register.

The most powerful approach combines UK corporate registry data with international databases (OpenCorporates, ICIJ OffshoreLeaks), property records (HM Land Registry overseas companies dataset), regulatory enforcement records (FCA, FRC, Solicitors Disciplinary Tribunal), and leaked document datasets. The investigative journalist’s task is to map the network, not just describe its components.

When financial investigations matter most

• 1A public official or politician holds undisclosed interests in companies that benefit from their decisions.
• 2A company delivers public services on a large contract while concealing its beneficial ownership through offshore structures.
• 3An FCA enforcement notice reveals that a firm's management was aware of money laundering red flags and took no action.
• 4A company director has been disqualified by the Insolvency Service and has set up a new firm under a similar name.
• 5UK property is held by a foreign company whose ultimate beneficial owner is concealed — cross-reference Land Registry overseas data with OffshoreLeaks.
• 6An FRC investigation finds that an auditor signed off accounts that misrepresented a company's financial position.
• 7Tax tribunal decisions reveal that a company or individual used a scheme that HMRC subsequently defeated — pattern journalism.

Red flags in corporate and financial data

• ⚠A company with a registered address at a company formation agent, multiple resignations of officers in a short period, and dormant accounts.
• ⚠Repeated use of the same registered address across many companies that appear unconnected.
• ⚠Accounts filed late year after year — particularly late filing of group accounts.
• ⚠A PSC register entry showing a Persons with Significant Control disclosure via a chain of companies in low-disclosure jurisdictions.
• ⚠An individual who appears as a director of many companies simultaneously, often in different sectors — nominee director risk.
• ⚠An FCA-authorised firm that has had multiple supervisory notices or warnings without a final notice yet.
• ⚠A company director whose disqualification period has ended and who now controls a new company in the same sector.

Practical checklist for finance investigations

• Search Companies House for all companies where the subject is or has been an officer or PSC — download the full filing history.
• Download the company accounts for the past five years and read the notes, not just the headline figures.
• Check the PSC register to identify beneficial owners and trace the ownership chain through any corporate PSCs.
• Search OpenCorporates for the subject and all connected companies across international jurisdictions.
• Search the ICIJ OffshoreLeaks database for the subject's name, known associates and connected companies.
• Check HM Land Registry's overseas companies property ownership dataset for UK property held by foreign-registered entities.
• Search the FCA register and enforcement notices for any authorised firm or individual connected to the story.
• Search FRC enforcement decisions and audit quality review reports for auditors connected to the subject.
• Check the Insolvency Service's disqualified directors register and search for follow-on companies.
• For tax cases, search the First-tier Tax Tribunal and Upper Tribunal databases by appellant name.

Common mistakes

• ›Treating offshore structures as inherently suspicious — many are used for entirely legitimate tax planning or privacy reasons; the story is in the conduct, not the structure alone.
• ›Not reading the full company accounts — the headline numbers are less revealing than the notes, related-party transactions and going-concern language.
• ›Assuming the PSC register is complete — it relies on companies and individuals making honest declarations, which is not always the case.
• ›Missing the auditor angle — a big-four firm auditing an entity that later collapses or is found to have misstated accounts is itself a story.
• ›Not checking the historic filing history — past addresses, resigned officers and previous names are often as revealing as current data.
• ›Conflating legal tax avoidance with tax evasion — one is lawful, the other is criminal; the distinction matters enormously for legal risk.
• ›Publishing company ownership allegations without giving the subject a meaningful opportunity to explain the structure.

Related guides

Primary sources

• Companies House — free company search and API
• Companies House API documentation
• ICIJ OffshoreLeaks database
• OpenCorporates — global company registry aggregator
• FCA — enforcement decisions and Financial Services Register
• FRC — enforcement and audit quality review reports
• HM Land Registry — overseas companies property ownership data

Frequently asked questions