Tom Chapman, Business Development Manager at Lucion Survey, explores the arrival of the National Underground Asset Register (NUAR), what it means for anyone planning to break ground, and why even the best data is only part of the solution.
Every year, thousands of projects across the UK are disrupted by something that shouldn’t have been a surprise: hitting an underground cable, pipe, or service that either wasn’t shown on the plans, or wasn’t where the plans said it would be.
The consequences range from inconvenient to catastrophic. Delays. Emergency repairs. Safety incidents. In the worst cases, serious injury or death.
With the rollout of the National Underground Asset Register (NUAR), there’s a growing expectation that these incidents should become a thing of the past. And while NUAR represents a genuine leap forward, the reality on the ground, quite literally, is more nuanced.
But what does NUAR actually do? Where does it fall short? Why does combining national data with site-based investigation not just best practice, but essential for anyone serious about breaking ground safely and on schedule?
Why NUAR Won’t Stop Your Next Underground Strike (But It’s Still a Game-Changer)
I had a conversation last month with a project manager who’d just lost three weeks on a residential scheme in Manchester. Mechanical excavator, day one, straight through a telecoms cable that wasn’t supposed to be there. Or rather, wasn’t shown to be there.
“We had the plans,” he told me. “We did everything right.”
Except the plans were wrong. Or incomplete. Or based on a hand-drawn sketch from 1987 that had been digitised, copied, and passed down through three different asset owners. The cable was real. The consequences were real. The delays, the emergency works, the explaining to the client, all very real.
And this happens 230 times every working day in the UK.
The Numbers We Don’t Talk About Enough
According to Zurich, an estimated 60,000 underground utility strikes cost the UK economy approximately £2.4 billion annually. That’s not just the immediate repair bills. When you factor in project delays, property damage, traffic disruption, safety incidents, and environmental costs, the true impact of a single strike can be significantly higher than the direct repair cost.
For contractors, this isn’t just about money. It’s about reputation. It’s about the conversation you have to have with your client when you tell them the programme’s slipped. It’s about the risk to your people on site. And increasingly, it’s about your insurance premiums and whether you can even tender for certain types of work.
And most importantly, beyond cost implications, reputational damage, and serious injuries from striking electricity networks alone run into the hundreds each year, with fatalities still occurring. Add gas, water, fibre optic cables (all the hidden infrastructure that keeps modern life running) and the cost of getting it wrong can, understandably, be cause for inaction.
This is where the National Underground Asset Register (NUAR) comes in, and why I’m genuinely excited about it, but also realistic about what it can and can’t do.
A Step Forward, Not a Silver Bullet
NUAR is the UK’s first attempt to bring underground asset information into one national, accessible platform. Instead of chasing down records from six different utility companies, statutory undertakers, and local authorities, which may be incomplete or contradictory information, you get a single starting point.
One map.
One dataset.
One version of what’s supposed to be down there.
For anyone who’s ever tried to piece together a coherent picture of underground constraints from a stack of PDFs and outdated CAD files, this is transformative.
But, NUAR is only as good as the data that goes into it. It’s a register, not a survey. It shows what should be there based on records, not necessarily what is there in reality.
The Last-Metre Problem
Asset records might show a water main running along the boundary of a site. But is it 50mm to the left or right of where the line is drawn? Is it at the depth stated, or has ground settlement, previous works, or simple recording error put it somewhere else entirely? Has additional infrastructure been added since the record was created?
And what about assets that were never formally recorded in the first place such as historic services, abandoned cables, private drains?
This is why I tell every client the same thing. NUAR gives us the best starting point we’ve ever had. But breaking ground still requires boots on the ground, GPR kit in hand, and someone who knows how to interpret what the data is actually telling them.
What “Doing Everything Right” Actually Looks Like
The HSE’s HSG47 guidance lays out three elements of safe excavation:
- Planning the work
- Locating and identifying buried services
- Safe digging practices
NUAR helps enormously with the first part. It streamlines planning, reduces the time spent chasing records, and gives you a far more complete picture earlier in the project lifecycle. That means better cost forecasts, more realistic programmes, and fewer horrible surprises when tenders come back.
But the second element, locating and verifying what’s underground, still requires a physical survey. PAS 128-aligned utility detection. Ground Penetrating Radar. Cable avoidance tools. Trial holes where necessary. Professional interpretation of results in context.
That’s where Lucion Survey comes in. We use NUAR as the foundation, then build on it with site-based investigation. We identify discrepancies, flag risks, map unknowns, and give you outputs you can actually rely on when making the call to dig.
Confidence Before You Commit
I’ve worked in the industry for over 15 years’ and what I’ve seen change over the last few years, and NUAR is accelerating this, is a shift from reactive to proactive underground risk management.
The old approach was to get the statutory plans, do a quick sweep, crack on, and deal with problems if they arise.
High risk, high cost, high stress.
The new approach (the one that our forward-thinking clients are now demanding) prioritises understanding what’s there, verifying it, designing around it, and only then committing plant and programme.
NUAR makes that second approach faster and more cost-effective than it’s ever been. But it doesn’t make it automatic. You still need the expertise, the equipment, and the site-based validation.
The Takeaway
If you’re tendering for groundworks, planning a new build, or about to break ground on infrastructure, my advice is simple. Use NUAR. Absolutely. It’s a powerful tool and it will save you time and headaches.
But don’t stop there. Combine it with proper utility surveying, especially GPR, and make sure you’re working with people who understand both the data and the dirt.
Because the one thing worse than not having information is thinking you have information when you don’t.
And if you’d like to talk to our team about how to ‘Do Your Project Right’ drop us an email at [email protected]
