There is something quietly radical about replacing asphalt with reeds.
Not because it is new, but because of what it represents. A shift in how we see the city itself.
In London, that shift is already visible. But it is not confined to the capital. Across the UK, pressure on drainage systems, flood risk, and water quality is forcing a rethink of how urban space is used and what it is used for.
What London offers is clarity. A dense, complex environment where the consequences of getting water wrong are immediate, and where the benefits of doing things differently can be seen quickly.
View over Southampton's newest city park Arundel Gardens, a refurbished car park.
From redundancy to resource
The UK is not short of space. It is short of recognised space.
Oversized verges, disused hardstanding, underperforming public realm, fragments of land left behind by previous uses. These are rarely considered part of water infrastructure, yet collectively they represent a significant opportunity.
In Lewisham, interventions around Ladywell Fields have restored the natural function of the floodplain, allowing water to spread, slow, and settle. In Barking, Mayesbrook Park has shown how engineered landscapes can be reshaped into working wetlands, delivering measurable reductions in flood risk while improving ecological value.
At a larger scale, Walthamstow Wetlands demonstrates what happens when infrastructure and ecology are treated as part of the same system rather than separate concerns.
These are London examples, but they reflect a wider national condition.
A system under pressure
For decades, urban drainage has been built on a single premise: remove water as quickly as possible.
That model is now under strain.
According to the UK Centre for Ecology & Hydrology, around 70% of urban surfaces in UK towns and cities are impermeable, preventing rainwater from naturally soaking into the ground. The result is predictable. Increased surface runoff, overwhelmed drainage systems, and a growing reliance on ageing sewer infrastructure.
At the same time, rainfall patterns are shifting. More intense downpours, longer dry spells, and greater variability are placing additional stress on systems that were never designed for this level of volatility.
The response is a growing adoption of Sustainable Drainage Systems, SuDS, designed to manage water at source.
The principle is simple. Slow the water. Store it. Let it infiltrate.
The opportunity in what we already have
This is where the idea of repurposing redundant urban land becomes critical.
From city centres to suburban estates, the UK contains thousands of small, overlooked sites. Former car parks, redundant service yards, neglected corners of public land. Individually minor, collectively transformative.
If even a fraction of these spaces were reworked to manage water, the cumulative impact would be significant.
Reduced runoff into sewers. Lower flood risk. Improved water quality. Increased urban biodiversity. Local cooling during heat events.
This is distributed infrastructure. And it scales not through size, but through number.
A national pattern emerging
What is visible in London is already being echoed elsewhere.
The same shift is playing out in different forms, shaped by local geography but driven by a common pressure to rethink how cities handle water. In Manchester, former industrial land at West Gorton Community Park has been reworked into a landscape that stores and manages rainfall as part of its design, rather than pushing it downstream. In Sheffield, the Grey to Green Corridor has quietly rewritten the role of urban roads, replacing hard edges with planting that absorbs and filters water at street level.
Further north, Glasgow’s Smart Canal shows how existing infrastructure can be used dynamically, holding and releasing water to manage flood risk while enabling development around it. And in places like Newcastle, the approach becomes more granular, with smaller SuDS interventions stitched into the fabric of neighbourhoods, each one modest in scale, but collectively reducing pressure on the wider system.
Taken together, these are not isolated projects. They are variations on a theme.
Not a single solution, but a shared direction of travel. One that suggests the future of urban water management will be distributed, visible, and built into the spaces we have already created.
Beyond engineering
What distinguishes these interventions is not just their function, but their visibility.
Traditional water infrastructure is hidden. Pipes, culverts, tunnels. Essential, but out of sight.
Nature-based systems are different. They are seen, experienced, and understood.
At Mayesbrook Park, the benefits are measurable. Flood storage capacity has increased, habitats have been restored, and water quality has improved. But equally important is the change in how people interact with the space.
Water becomes visible. Legible. Part of everyday life.
That shift has implications for public engagement, policy support, and long-term stewardship.
West Gorton Community Park, Manchester
From pilot to programme
The direction of travel is clear. Policy frameworks increasingly recognise the role of nature-based solutions in addressing flood risk, water quality, and climate resilience.
The challenge is delivery.
Large, flagship schemes demonstrate what is possible. But the real opportunity lies in replication. Smaller, distributed interventions embedded across the urban fabric.
To achieve that, several barriers need to be addressed.
Land ownership. Maintenance responsibilities. Funding mechanisms. Planning integration.
None is insurmountable, but all require coordination.
A different way of seeing the city
What is emerging is not just a set of projects, but a change in perspective.
Urban land is no longer viewed solely through the lens of its immediate function. It is being reconsidered as part of a wider system, one that includes water, ecology, and climate resilience.
That shift opens up new possibilities.
Spaces that were once written off as redundant can become assets. Not through large-scale redevelopment, but through targeted, functional change.
A quiet transformation
There is no single moment where this shift becomes visible.
It happens incrementally. A verge becomes a rain garden. A park becomes a floodplain. A piece of hardstanding is broken and replanted.
Each intervention is small. But together, they begin to change how the city works.
London may be the lens. But the opportunity is national.
