The Circle line name was not used officially until 1936 – but its existence is fundamental to the Tube’s early beginnings.

Delays on the DLR, Circle and Windrush line - The Windrush, Circle, DLR lines are facing delays on Friday morning ...

For the next 60 years, the line’s route remained unchanged, with trains travelling in both directions in a simple circle through Edgware Road. But in 2009, the Circle line was extended to ...