Are UK businesses overlooking a growing infrastructure risk?

For businesses, that creates a growing but largely unrecognised infrastructure risk, one that sits beneath buildings, out of sight, until failures force it into view. According to Lee Carlin, Group CEO of drainage and plumbing service partner LDF Group, the issue is structural. “If you strip it right back, we’re still relying on infrastructure that was designed in a completely different era. It was built incredibly well for its time, but it wasn’t built for what we’re asking it to do now. You’ve got a population that’s grown by nearly 30 million people since those systems were first put in, buildings are busier, usage is heavier, and the margin for error is a lot smaller. But the system underneath hasn’t really changed to reflect that.”

A systemic gap between infrastructure and reality 

The core issue is not simply that drainage systems are old and in need of upgrades, it’s that the way buildings operate today has changed considerably, while the infrastructure hasn’t. Victorian networks were built around lower density, more predictable usage and far less pressure from peak demand. Today’s environments, particularly in retail, hospitality and healthcare for example, place sustained and often unpredictable strain on those same systems.

Carlin says that mismatch is where risk begins to build. “It’s easy to focus on the age of the infrastructure, but that’s only part of the story. The bigger issue is the gap between what those systems were designed for and how they’re actually being used day-to-day. You’ve got higher volumes, more constant usage and less tolerance for downtime. And then you add in things like wet wipes and grease build-up from commercial kitchens, which those systems were never built to cope with. That combination creates pressure that just wasn’t there before.”

Much of the UK’s sewer network dates back to the Victorian era, with systems now over 100-150 years old. More than 500,000 km of sewers underpin UK infrastructure, much of it operating beyond its original design capacity. Despite this, drainage is still treated as a reactive issue – leaving businesses exposed to disruption and downtime.

Why reactive maintenance is amplifying the risk 

Despite that pressure, LDF Group says most organisations still approach drainage in a largely reactive way: dealing with issues as and when they arise. However, that approach increasingly doesn’t stack up.

In practice, early issues like build-ups of fat and grease are missed or ignored and only surface when they trigger something more serious such as flooding or when the system backs up. At that point, response is urgent rather than planned, and costs can escalate quickly.

“A lot of businesses still see drainage as something you deal with when it stops working,” Carlin explains. “Historically, that’s probably been fine. But now, with the way buildings are being used, by the time it fails you’ve already lost control of the situation. You’re reacting under pressure, you’re paying more, and you’re often dealing with disruption that could have been avoided.”

Failure rarely stays contained 

When drainage issues do surface, the impact is rarely in isolation. A localised issue, whether that’s a blockage or overflow, can quickly affect core building functions, from toilets and kitchens to waste systems. In some cases, this can mean a partial or full closure.

For customer-facing environments, the implications extend far beyond maintenance. “Once drainage fails, it affects how a building operates straight away. Whether it’s a hotel, a leisure site, or a retail environment, if the building relies on footfall then you’re immediately into lost revenue, poor customer experience, and potential reputational damage.”

From hidden issue to managed risk 

According to LDF Group, the organisations getting ahead of this are simply treating drainage differently. Rather than leaving it unmanaged, they’re building in visibility and addressing issues before they turn into operational problems.

“What changes isn’t the system itself, in fact, it’s the level of control you have over it,” Carlin says. “If you’re checking it, maintaining it, understanding how it’s performing, you take a lot of that unpredictability out. Whereas if you leave it, you’re essentially waiting for the worst-case scenario to happen.”

As pressure on infrastructure continues to grow, LDF Group expects drainage to become a more visible issue. For organisations that continue to overlook it, it will remain what it has always been: an invisible system, until it very suddenly isn’t.