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

There are three ways a line and a circle can be associated, ie the line cuts the circle at two distinct points, the line is a tangent to the circle or the line misses the circle. To work out which ...

There are minor delays on the Circle line due to train cancellations. It is impacting the whole line. A reduced service ...

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 ...