Tideway is a major infrastructure project in London, aimed at improving the city's sewer system. It involves the construction of a new, 25-kilometer underground tunnel that will help manage excess rainwater and sewage, reducing the risk of flooding and pollution in the River Thames. The project is designed to capture and store sewage overflow during heavy rainfall, preventing it from entering the River Thames. This initiative is part of a broader effort to enhance urban water management and protect the environment, benefiting both residents and wildlife in the area.