Technical due diligence
What is technical due diligence for a fibre network or altnet?
Short answer
An independent review, before a deal closes, of whether the business can really deliver and run what its plan says: how the work gets delivered, what the systems, the data and the AI can carry, and what depends on one person. NJG Consultancy does it for buyers and investors, and for founders getting ready to sell or raise, with plain findings ranked by what they mean for the deal and the first hundred days after it.
What it looks at
- Delivery: how the build and connection work is planned, contracted and measured, and whether the numbers in the plan match what the business has actually done.
- Operations: how work moves between teams, tools and partners, from order to live service and from fault to fix, and where it leaks.
- Systems and data: whether the records of what has been built and who is connected can be trusted, and whether the systems will carry the next stage of growth.
- AI and automation: what the software and AI really do today, and what is still a plan.
- People: what depends on one person, and what happens to delivery if they leave.
What you get
Plain findings, ranked by what they mean for the deal and the first hundred days after it. Each one says what was found, the evidence, why it matters to the price or the plan, and what would fix it.
Why buyers ask for it now
UK altnets are consolidating. BDO wrote in September 2025 that "Altnets are exiting the growth phase and entering a 'shakeout' phase", and that "In 2024, Netomnia and Brsk joined forces to become the third-largest altnet in the UK, with a reach of 1.5 million homes." When networks change hands, the buyer needs to know what it is really buying.
Who does the work
Neil Grose, who came up through UK full-fibre network delivery, from apprentice to running delivery and engineering at board level. As Lit Fibre's Chief Delivery Officer he led Lit's side of the due diligence on its sale to CityFibre (2024): see the track record.
What it is not
NJG Consultancy gives operational and technical findings. It does not give financial, legal or tax advice, and works alongside the advisers who do.
NJG Consultancy does not do network design, permits or construction software. For those, see Konstructiv, a separate company.
How it starts
Email hello@njgconsultancy.com with a couple of lines on the deal or the problem. Neil reads every message himself and replies with a straight answer: whether he can help, and how.
Related questions
Does NJG Consultancy do buy-side or sell-side technical due diligence?
Both. For buyers and investors it is an independent read on the business they are about to buy or back. For founders it is a buyer-style review before the data room opens. See sell-side readiness.
Is technical due diligence the same as financial due diligence?
No. Technical due diligence looks at how the business delivers and runs: its work, systems, data, AI and people. Financial, legal and tax due diligence are done by other advisers. NJG Consultancy gives operational and technical findings. It does not give financial, legal or tax advice, and works alongside the advisers who do.
Sources
Last updated .