Connaught Tunnel

The biggest project affecting the Subterranean City over the next few years is Crossrail. There's an interesting article on London Reconnections (see Down in the Dark: Crossrail,the Connaught Tunnel and Silvertown station) about the Connaught Tunnel, formerly on the North London line docklands section from Stratford to North Woolwich that's been closed since December 2006. It's to be reused for Crossrail as it makes its way from Canary Wharf to Abbey Wood.