the Northern line’s origins lie in two separate early underground railways. The first to be built was the City & South London Railway, which was also the first electric Tube railway in the world.

The tight, compact tunnels were built deep, nestled in the clay beneath London. In the early days, temperatures in the Underground were considered comfortably low. “The Underground’s the only ...

Now a single Tube route, the Northern line’s origins lie in two separate early underground railways. The first to be built was the City & South London Railway, which was also the first electric Tube ...

The Circle line name was not used officially until 1936 – but its existence is fundamental to the London Underground’s early beginnings. The loop was called the Inner Circle in Parliamentary ...