Sequential Test
The long-awaited Planning Practice Guidance (PPG) update on the sequential test has now been published (17 September 2025), having originally expected it at the start of the year. Our initial reading is that it has been worth the wait when it comes to surface water flood risk. NPPF Paragraph 175 states that where built development is proposed in areas at risk of any form of flooding, a sequential test should be applied. Paragraph 027 (Reference ID: 7-027-20220825) of the updated PPG now helpfully clarifies the position and states the following:
“In applying paragraph 175 a proportionate approach should be taken. Where a site-specific flood risk assessment demonstrates clearly that the proposed layout, design, and mitigation measures would ensure that occupiers and users would remain safe from current and future surface water flood risk for the lifetime of the development (therefore addressing the risks identified e.g. by Environment Agency flood risk mapping), without increasing flood risk elsewhere, then the sequential test need not be applied.”
This is good news and hopefully means that schemes with sound surface water drainage strategies do not need to apply a sequential test which will have time and planning balance benefits.
The above reforms seek to reshape England’s planning system to encourage faster infrastructure delivery and strategic planning and environmental gains, yet they risk eroding local distinctiveness, stretching administrative capacity, and creating strategic-planning hiatuses as devolution reshuffles governance. Only time will tell.