On this day in 1863, that’s 150 years ago, the first section of the London underground opened in the form of the Metropolitian line between Paddington Station and Farrington. The reason the the line was built in the first place is that there were a series of main lines that terminated at what was then the edge of the city and a combination of property prices and local laws prevented them from being linked up on the surface. Going under the road corridors was a way around this problem and the first tunnels were built using cut and cover methods. Over the 150 years since that time, new lines and extensions have turned the system into what exists today along the way becoming one of the most famous systems in the world.
Crucially thought those original tunnels are still in use today which is not only impressive but also shows how long the benefit of this type of infrastructure lasts. It probably provides a hell of a lot more economic benefit to the city now than it did even 30 year after it was built. This is especially important as we debate projects like the CRL as it will have a very very long lasting impact on the city yet the current assessment guidelines only look it giving benefits over a 30 year period.