Resources

Expert Guides

In-depth guides on flood risk, drainage, and planning policy — written by practitioners for developers, planners, and consultants.

Guide

Drainage Strategy for Planning: The Complete Guide

Everything you need to know about drainage strategies for planning applications — what they include, when they're required, how to integrate SuDS, and how to discharge planning conditions.

15 min read Updated Feb 2026
Guide

Water Neutrality: A Developer's Guide

A comprehensive guide to water neutrality for developers — what it means, the Sussex North situation, how to calculate water budgets, offsetting strategies, and the latest policy changes.

12 min read Updated Feb 2026
Guide

Climate Change Allowances for Flood Risk: EA Guidance Explained

How to apply Environment Agency climate change allowances to flood risk assessments — current guidance, uplift percentages, and practical application.

8 min read Updated Feb 2026
Guide

Flood Risk Assessments: The Complete Guide

A comprehensive guide to flood risk assessments in the UK — when you need one, what's involved, costs, timelines, and how to secure planning approval.

12 min read Updated Feb 2026
Guide

Sequential Test and Exception Test: A Developer's Guide

Step-by-step guidance on passing the Sequential Test and Exception Test for development in flood risk areas under NPPF.

9 min read Updated Jan 2026
Guide

SuDS Design Guide: Planning, Design, and Approval

A practical guide to sustainable drainage systems — from planning requirements and the management train to detailed design and adoption.

11 min read Updated Jan 2026
Guide

Flood Zones Explained: Zones 1, 2, 3a, and 3b

A clear explanation of UK flood zones 1, 2, 3a, and 3b — what they mean for your development, what restrictions apply, and how to navigate planning.

10 min read Updated Jan 2026