Software, Systems & Source Code
When a software project fails, a system underperforms, or ownership of code is contested, the answer lies in the technical detail. Our experts examine failed implementations, fitness-for-purpose disputes, source code and system architecture, then translate the engineering into clear, impartial evidence. From bespoke builds and enterprise platforms to SaaS and cloud-native systems, we establish what happened and why, and set it out plainly for the court.
What we cover
- Failed and delayed software projects
- Fitness-for-purpose and quality disputes
- Source code review and code ownership
- System architecture and performance
- Bespoke, enterprise, SaaS and cloud-native systems
Failed and delayed software projects
The most common software disputes we are instructed on involve projects that overran, went live in an unusable state, or were abandoned altogether. Enterprise platforms, ERP and finance systems, bespoke builds and large integration programmes all fail in recognisable ways, and untangling why one failed calls for someone who has seen the anatomy of these projects from the inside.
Our experts examine what actually happened against what was promised: the requirements and specification, the delivery methodology, the testing and acceptance regime, and the project governance on both sides. That lets us set out, impartially, whether the technology was fit for purpose, where responsibility for the failure genuinely lies, and which of the competing accounts the contemporaneous evidence supports.
Source code review and code ownership
When ownership, copying or licensing of code is contested, the source itself is the primary evidence. Our experts carry out structured source-code review and comparison to address allegations of copying, to establish authorship and ownership of bespoke work, and to assess open-source licence compliance and the obligations that flow from it.
This work is methodical and reproducible: we document how code was examined, what was compared against what, and what the similarities or differences actually mean once boilerplate, generated code and third-party libraries are accounted for. The result is evidence a court can rely on rather than an impression.
System architecture, performance and fitness for purpose
Many disputes turn not on a single defect but on whether a system, taken as a whole, did what it was supposed to. Our experts analyse system architecture, scalability and real-world performance, and assess defects against the contractual specification and the standards a competent supplier should have met.
We are equally at home with legacy estates, modern SaaS and cloud-native systems, and we explain clearly how design decisions, integration choices and operational conditions combined to produce the behaviour in dispute.
How we present software evidence
Whatever the underlying question, the output is evidence built to withstand scrutiny: CPR Part 35 compliant reports, joint statements with opposing experts, and clear oral evidence under cross-examination. Our experts translate architecture diagrams, code and technical logs into plain English a judge can follow, without losing the rigour a technical audience would expect.
We have experts in this area
A bench of court-tested specialists ready to be instructed. Profiles are anonymised; full CVs and availability are provided on request.
Want to know more about this sector?
Explore our case studies and technical writing in this area.

Bates v Post Office
15 January 2024 · 7 min read
One of the most consequential IT disputes in English legal history turned on a single question: could the Post Office's Horizon accounting system produce shortfalls in a branch's accounts that were not the sub-postmaster's fault? EVO's founder, Jason Coyne, acted as the claimants' independent IT expert, and the court preferred his evidence.

What makes a source-code review defensible under CPR Part 35
3 August 2026 · 7 min read
A source-code review only helps a case if it survives scrutiny. Here is the method that makes technical evidence defensible, from scope and disclosure to the expert's duties under CPR Part 35.