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Why Does Rain Stop Play at Wimbledon? The Science of Grass Court Drainage

Every Wimbledon has the same ritual. A few spots of rain, the umpire calls a halt, and within seconds the ground staff are sprinting the covers across the grass. It looks like an overreaction on a warm July afternoon. It…
Posted on 8th July, 2026
, in SuDS 
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How Football Pitch Drainage Works: Lessons from the 2026 World Cup

Watch a World Cup match in a downpour and the ball still runs true. There are no puddles on the halfway line, no spray kicking up at every pass. That is not luck. Football pitch drainage is a piece of…
Posted on 7th July, 2026
, in SuDS 
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Climate Whiplash: What New UK River Research Means for Flood and Drought Risk

Climate whiplash, the abrupt swing between flood and drought as the climate warms, is set to become more common across the UK, according to major new research led by the University of East Anglia's Tyndall Centre. The study modelled almost…
Posted on 19th June, 2026
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The Four Pillars of SuDS Explained

The four pillars of SuDS are water quantity, water quality, amenity and biodiversity. They are the four objectives every well-designed sustainable drainage system should deliver together, set out in the CIRIA SuDS Manual (C753) and now echoed in England’s 2025…
Posted on 16th June, 2026
, in SuDS 
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Permeable Paving for Planning Applications: When It Works and When It Doesn’t

Permeable paving is one of the most common SuDS features used in drainage strategies for planning applications, and on the right site it is one of the most useful. It lets rainfall pass through the surface into a stone sub-base…
Posted on 15th June, 2026
, in LLFA 
, in SuDS 
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Do You Need Infiltration Testing? When It’s Required for Planning

Do you need infiltration testing? You need it when your drainage strategy relies on getting surface water into the ground and your planning authority wants proof the ground can actually take it. If you are proposing soakaways, infiltration trenches or…
Posted on 11th June, 2026
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Residual Flood Risk Explained: How It’s Assessed and Managed

Residual flood risk is the risk left over after defences, drainage and mitigation have done what they can. No scheme removes risk entirely. A defended site still floods if a barrier is overtopped, if a defence breaches, or if a…
Posted on 9th June, 2026
, in NPPF 
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Groundwater Flood Risk Maps in the UK: How to Check a Site

There is no single official groundwater flood map for the UK in the way there is for rivers and the sea. That gap is the first thing to understand when you try to check groundwater flood risk: the familiar national…
Posted on 2nd June, 2026
, in BGS 
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EA River Modelling Technical Standards (2026): What Flood Risk Assessments Must Demonstrate

Hydraulic modelling sits behind almost every detailed flood risk assessment, and the Environment Agency sets the standard for how those models are built and reviewed. The EA's river modelling technical standards define what a credible model looks like and what…
Posted on 8th May, 2026
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Does the Jubilee River Increase Downstream Flood Risk?

The Jubilee River is an 11.6 kilometre artificial flood relief channel opened in 2002 as part of the Maidenhead, Windsor and Eton Flood Alleviation Scheme on the River Thames. Designed to divert up to around 180 cubic metres of water…
Posted on 12th February, 2026
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River Thames Scheme delays raise questions over flood defence delivery

Recent political intervention and growing local frustration over the River Thames Scheme have brought long-running questions about flood defence delivery sharply back into focus. What began as a technically ambitious response to well-understood flood risk is increasingly becoming a case…
Posted on 9th February, 2026
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How Increasing Rainfall Is Changing Flood Risk in the UK

Flooding across the UK is becoming more frequent, more widespread and easier to trigger. A growing body of scientific evidence shows that this is being driven not by radically different storms, but by increasing rainfall intensity and wetter autumn and…
Posted on 5th February, 2026
, in SuDS 
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The CIRIA SuDS Manual (C753): What It Is and How to Use It in 2026

The CIRIA SuDS Manual (C753) is the UK's principal design guide for sustainable drainage systems: 968 pages covering how SuDS should be planned, designed, built, operated and maintained. CIRIA published it in November 2015 to replace the original 2007 manual,…
Posted on 26th January, 2026
, in SuDS 
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Does Flood Risk Affect House Prices?

Flood risk has stopped being a background detail in the UK housing market. Buyers now ask whether a property sits in a flood risk area before they offer, lenders weigh flooding when they assess a mortgage, and sellers know that…
Posted on 16th January, 2026
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Guildford Flood Alleviation Scheme: flood risk, history and consultation

Guildford’s relationship with flooding is long-standing and well documented. The town sits at a natural constriction on the River Wey, where historic development, bridges and river training have progressively reduced the space available for flood flows. Significant flooding was recorded…
Posted on 14th January, 2026
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Construction Stage Flood Risk and the Lessons from Attleborough

Flood risk is most often scrutinised at the point a planning application is determined. Flood Risk Assessments are prepared, mitigation is proposed, and decisions are taken on the assumption that what has been assessed on paper is what will exist…
Posted on 13th January, 2026
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How AI Could Improve Flood Risk Management

Artificial intelligence is starting to reshape flood risk management, though not in the way the headlines suggest. AI in flood risk management works best as a support layer: it can sharpen flood forecasting, widen warning coverage and speed up the…
Posted on 5th January, 2026
, in AI 
, in NPPF 
, in SuDS 
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Shropshire Canal Failure: What the Whitchurch Canal Breach Means for Flood Risk and Planning

A canal breach near Whitchurch, Shropshire, in the early hours of 22nd December 2025 drew national attention. The scale of the collapse was part of it, but so was what the failure revealed about how the UK manages, and plans…
Posted on 23rd December, 2025
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Integrating Rainwater Harvesting into SuDS Design

Collecting rainwater isn’t a new idea. Many of us already do it at home, using a simple water butt to gather rain off the roof and reuse it on the garden. That, in essence, is what rainwater harvesting is: catching…
Posted on 24th October, 2025
, in SuDS 
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Green SuDS: Nature-Based Drainage in Modern Planning

Green SuDS are nature-based drainage features — swales, rain gardens, basins, green roofs and wetlands — that manage rainwater using vegetation and soil rather than buried pipes and tanks. Across England's planning system they have become the preferred form of…
Posted on 22nd October, 2025
, in SuDS 
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NAFRA2 and Home Sales: Rising Flood Awareness

When the Environment Agency released its latest National Assessment of Flood Risk for England (NAFRA2) in early 2025, the updated dataset immediately began reshaping how flood risk is understood — and, increasingly, how property is bought and sold. Many homeowners…
Posted on 20th October, 2025
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CIRIA Launches Guide for Early SuDS Planning

Posted on 6th October, 2025
, in SuDS 
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What is BS 6297 infiltration testing for foul drainage fields?

BS 6297 infiltration testing measures whether the ground on a site can absorb and treat effluent safely, and it is what decides whether a drainage field is a workable way to deal with foul drainage where there is no mains…
Posted on 26th June, 2025
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What the 2025–30 London Surface Water Strategy Means for Planning

As climate change accelerates and urban environments become denser, cities around the world face mounting challenges in managing water. Nowhere is this truer than in London, where the convergence of ageing infrastructure, rising population pressures, and increasingly erratic weather patterns…
Posted on 22nd May, 2025
, in SuDS 
, in TfL 
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Septic tank regulations in England: the General Binding Rules in 2026

The septic tank regulations that apply in England are the General Binding Rules — statutory conditions set by the Environment Agency that let a septic tank or small sewage treatment plant discharge legally without an environmental permit, provided it stays…
Posted on 28th February, 2025
, in SuDS 
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Foul, Surface & Combined Sewers: What to Know

When planning a new development, one crucial factor that developers, architects and planners must consider is how wastewater and surface water will be managed. The type of sewer infrastructure present on or near a site can significantly influence the design,…
Posted on 25th February, 2025
, in SuDS 
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Thames Barrier: London’s Flood Defence Against Tidal Surges

The Thames Barrier is the largest movable flood barrier protecting London, holding back the tidal surges that would otherwise push up the estuary and into the heart of the city. It spans 520 metres of the River Thames near Woolwich…
Posted on 14th February, 2025
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Natural Flood Management Schemes in the UK: How Real Projects Slow the Flow

Natural flood management schemes use woodland, wetlands, leaky dams and better-managed soils to slow and store rainwater across a catchment, taking the edge off flood peaks downstream. Across the UK, councils, rivers trusts and landowners now run dozens of these…
Posted on 3rd February, 2025
, in NFM 
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Flood Return Periods & Annual Probability Explained

If you have ever read a flood report or flood risk assessment, you may have met phrases like "1-in-100-year flood" or "annual probability of flooding". They sound technical, and they are easy to misread at exactly the moment they matter…
Posted on 20th December, 2024
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What is BRE365 Infiltration Testing (Soakaway Design)?

BRE365 infiltration testing is the in-ground test that measures how fast your site's soil can absorb surface water, so you can prove a soakaway will work and size it correctly. It follows BRE Digest 365, the standard UK method for…
Posted on 2nd December, 2024
, in NPPF 
, in SuDS 
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Flood Modelling Software: Tools & Techniques Guide

Posted on 20th November, 2024
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Topographical Surveys for FRA & SuDS: When Are They Needed?

A topographical survey is a precise measurement of land elevations, contours, and features, providing essential data for flood risk assessments (FRA) and sustainable drainage systems (SuDS). Using total stations, GPS, and laser scanning, these surveys create high-resolution 3D models or…
Posted on 18th November, 2024
, in Data 
, in NPPF 
, in SuDS 
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LiDAR Data for Flood Risk & Drainage Planning Explained

LiDAR (Light Detection and Ranging) is a cutting-edge remote sensing technology that helps analyse land elevation and surface characteristics. By sending out laser pulses and measuring their return time, LiDAR creates precise 3D topographical maps. This data is essential for…
Posted on 15th November, 2024
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What is GIS? A Key Tool for Flood Risk, Modelling & SuDS Design

Geographic Information Systems (GIS) is a powerful digital mapping tool used to analyse and visualise geographical data. GIS helps architects, planners, and developers overlay essential spatial information—such as flood zones, drainage networks, and land elevations—onto maps to make informed decisions…
Posted on 8th November, 2024
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Compensatory Flood Storage Explained: Level for Level Design for Planning

Compensatory flood storage is the replacement of floodplain storage lost to development, provided at the same flood levels so that floodwater is not displaced onto neighbouring land. It is a standard Environment Agency requirement where development raises ground levels or…
Posted on 1st November, 2024
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What Are Strategic Flood Risk Assessments (SFRAs)?

Strategic Flood Risk Assessments (SFRAs) are a central component of flood risk management in the English planning system. While frequently referenced in the preparation of Local Plans and in the context of site allocation, their strategic role is often underappreciated…
Posted on 23rd August, 2024
, in NPPF 
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EA Flood Map Challenge: What You Need to Know

Flood mapping plays a crucial role in the planning process across England. For landowners, developers, and planners, accurate flood zone designations by the Environment Agency (EA) are essential — not just for safe and sustainable development, but also to avoid…
Posted on 3rd June, 2024
, in NPPF 
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The Great Flood of 1968: causes, the towns it hit, and the risk today

In the middle of September 1968, much of South East England disappeared under water. Two days of near-constant rain, the worst of it on Sunday 15 September, turned quiet rivers into torrents and turned high streets into channels you could…
Posted on 14th September, 2023
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Beavers and Flooding: Do Beaver Dams Reduce Flood Risk?

For most of the last 400 years, beavers were missing from Britain, hunted out for their fur, meat and scent glands. Now they are back, and the policy around them has changed faster in the last two years than in…
Posted on 19th February, 2018
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What Is a Weather Bomb? Explosive Cyclogenesis Explained

A weather bomb is the informal name for a storm whose central pressure drops by at least 24 millibars in 24 hours, a process meteorologists call explosive cyclogenesis. The result is a deep, fast-developing area of low pressure that brings…
Posted on 22nd January, 2018
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Are Amphibious houses the answer to flood prone areas?

An amphibious house rests on ordinary foundations for most of its life. When floodwater arrives, the building rises within a purpose-built dock and floats, held in place by vertical guide posts. As the water recedes, it settles back down. The…
Posted on 1st March, 2017
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Communities Affected by Groundwater Flooding in the UK

Groundwater flooding is not spread evenly across the country. It clusters in particular communities, almost all of them sitting on or just downstream of the Chalk. Parts of Dorset, Hampshire, Berkshire, Oxfordshire, Kent, Wiltshire, Surrey and West Sussex are repeatedly…
Posted on 29th September, 2015
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