Independent expert evidence on software, data and systems

I am an IT expert witness based in London. I help courts, tribunals and legal teams understand what actually happened inside the technology at the centre of a dispute.

  • Civil Expert Witness Certificate, Cardiff University and Bond Solon
  • Reports under CPR Part 35 and in DIAC arbitration
  • Fellow of the Royal Society of Arts
Alfie Payne

Areas of expertise

Where I give expert opinion

I have worked as a Technical Director in web and software agencies, eCommerce retailers and SaaS companies. If it is not clear whether a matter fits one of these areas, ask.

All expertise

Representative engagements

Recent work

Anonymised summaries. Client and matter details are confidential.

All engagements

High Court, CPR Part 35

High Court evidence on bank account authenticity

Instructed in a matter involving a major bank to determine whether an individual had ever held an account or funds with the institution. Conducted a full technical investigation and produced a CPR 35 compliant expert report.

United States, litigation consultant

Software copyright and source code integrity

Acted as a litigation consultant in a high-profile US copyright dispute involving allegations of code manipulation and disputed authorship. Advised on version control systems, commit integrity, source and object code analysis, and DNS forensic evidence, with findings presented through memoranda, expert declarations and technical presentations.

DIAC arbitration and CPR Part 35

Messaging, email and screenshot manipulation

Supported matters involving alleged manipulation of communications across WhatsApp, Telegram, email platforms and device databases. Conducted detailed forensic reviews, built NLP similarity scoring tools, and contributed to DIAC-compliant and CPR 35 compliant reporting on authenticity and manipulation risks.

How I work with clients

How I am instructed

From early advice before proceedings start, through to written evidence and the hearing.

Party-appointed expert
Independent, CPR-compliant written evidence and, where required, oral testimony. I analyse the technical matters in dispute, address competing expert opinions, and set out clear reasoning to assist the court or tribunal.
Single joint expert
Where the parties need one independent expert to assess the technical issues, I work with all parties to reach fair, well-reasoned conclusions.
Arbitration
Domestic and international arbitration, including DIAC: assessing the technical evidence, preparing structured expert reports, and attending hearings to explain complex technical topics to arbitrators.
Pre-dispute advice
Early advice where technical concerns have emerged but proceedings have not started: clarifying the technical issues, assessing risk, identifying causation, and helping legal teams and executives understand the technical reality.
Technology consultancy
Support for organisations with complex technical challenges across architecture, software engineering, digital transformation and regulatory compliance, including system reviews, vendor oversight, technical due diligence and recovery of stalled projects.

Insights

Latest writing

All insights

  • AI governance is an organisational control, not an engineering feature

    AI governance only works when the whole organisation owns it. How ISO/IEC 42001 and the EU AI Act translate into evidence across the board, legal, data protection, security, procurement, HR and engineering, and what the evidence looks like when governance existed only on paper.

  • AI-written code and the standard of a competent developer

    AI coding assistants have changed how software is written, but not what production software has to be. Why MVP standard is not production standard, what provenance evidence exists for AI-generated code, and what a reasonably competent team does now.

  • Reading an SDLC from its artefacts, and why it fails without estate controls

    Whether a development team followed its own process can usually be shown from Git, CI and ticketing records. But that evidence is only as trustworthy as the IT estate it runs on: unmanaged devices, missing DLP and absent endpoint protection undermine both the software and the record of how it was built.

Let's work together

Discuss an instruction

Send a short outline of the matter, the parties and any deadlines. I will run a conflict check and reply, usually within one working day.