Pitt flood review

The Pitt Review was commissioned in August 2007 following a summer of unprecedented rainfall that saw 55,000 properties flooded and nearly half a million people left without power or water. The events of 2007 were a "wake-up call" for the UK, proving that the existing flood management systems—which were primarily designed to handle overflowing rivers and coastal surges—were entirely inadequate for "pluvial" (surface water) flooding caused by intense, localized downpours.

Sir Michael Pitt’s final 500-page report, published in June 2008, identified that the UK’s infrastructure was alarmingly vulnerable. A key example cited was the Mythe water treatment works in Gloucestershire, which flooded and left 350,000 people without running water for over two weeks, and the Ulley Reservoir in Yorkshire, which came dangerously close to total collapse. The review criticized the "fragmented" nature of flood responsibility, where no single agency had a clear overview of all flood risks, leading to confusion during the emergency response.

The review’s philosophy was one of "resilience" rather than just "defense." It argued that while it is impossible to prevent all flooding, the country must be better at adapting to it. This included radical suggestions such as ending the "automatic right" to connect new developments to the public sewer system and banning the use of non-permeable paving in front gardens.

The legacy of the Pitt Review is found in the Flood and Water Management Act 2010, which codified many of its findings into law. It established "Lead Local Flood Authorities" (usually County Councils), giving them a statutory duty to manage local flood risks. It also led to the creation of the Flood Forecasting Centre, a joint venture between the Environment Agency and the Met Office, which provides the highly accurate, color-coded flood warnings used today. The review is still cited as the gold standard for how the UK integrates climate change projections into national infrastructure planning.