The East London line is part of the London Overground network. It runs from north to south through East London. The railway was built in 1869 by the East London Railway Company. It reused the Thames Tunnel which was built for horse-drawn carriages. The line became part of the London Underground network in 1933. It closed on 22 December 2007 for refurbishment and expansion. In April 2010, it reopened as part of the London Overground network. Phase 2, which links the line to the South London line with a terminus at , opened on 9 December 2012. This created an orbital railway around inner London.
Orbital railway
The orbital railway includes the following routes: East London line from Highbury & Islington to Surrey Quays South London line from Surrey Quays to Clapham Junction West London line from Clapham Junction to Willesden Junction North London line from Willesden Junction to Highbury & Islington