Perhaps we should have a song to celebrate the Thames Tideway Tunnel.

Designed to improve the water quality of London’s River Thames, the tunnel will intercept wastewater from over 20 combined sewer overflows along 25 miles of the river, enabling cleaner, healthier water to flow downstream.

Construction, taking eight years and costing £5 billion, was completed at the end of March 2024. Commissioning is expected to begin over the summer, when live storm sewage flows will be diverted into the new infrastructure – essentially protecting the River Thames for the first time.