London 25km Super Sewer hooked up for commissioning

Engineers on the London Super Sewer project have successfully connected the new infrastructure to the capital’s existing sewer system. 
Ahead of the two-week connection job, a thick concrete wall separated the 25km super sewer from the 6.9km Lee Tunnel, which links Abbey Mills pumping station to Beckton sewage treatment works.
Now, those two tunnels are connected for the first time, creating the London Tideway Tunnels network and paving the way for the new system to begin its protecti