New aerial photography, taken high above London from a helicopter, shows off the scale of the work being undertaken to build the super sewer and clean up the River Thames.
Once operational in 2025, the Thames Tideway Tunnel will prevent 95% of the sewage spills that currently spill into the river, creating a cleaner, healthier environment for the city.
More than 20 construction sites spanning the capital from west to east, all connected underground by the super sewer, are seen, with the scale of the project visible from the air.
The photos also show more of the giant shafts at these locations being capped off, signalling the completion of underground works.
Starting in Acton, west London, at a depth of around 30 metres, the tunnel heads eastward, snaking directly beneath the River Thames for much of its route, before arriving at Abbey Mills Pumping Station and connecting to the Lee Tunnel, nearly 70 metres deep.
The images, taken earlier this year, show the engineering required for such a feat along with the new public spaces taking shape at locations such as Chelsea, Albert, and Victoria Embankments that will be left once the project is complete.