TUNNEL VISION: Episode 5 - Concrete Proposals

Episode 5 of Tunnel Vision is here, created and produced in the middle of the new national lockdown. The main Thames Tideway Tunnel only has 5.5km left to dig, but the 20km of tunnel we’ve constructed now needs the crucial secondary lining, and we take a closer look as to what that means and how it’s created. We then take a look at how the giant shafts across the project sites are built and why they’re so important.