Circle line will be extended soon

London Underground has announced that Circle line services will be extended to Hammersmith from December 2009. The changes will almost double the frequency of trains between Hammersmith and Edgware Road. As Circle line trains currently move around the line without a fixed terminus, any delays are compounded over time, and make it harder to offer a regular or reliable service. By giving the Circle line a start and end point London Underground will be able to recover the service quicker if there is disruption on the Circle or any of the lines that it shares tracks with. The new service will run from Hammersmith (H & C station) to Edgware Road station and then join the current Circle at Edgware Road and make a single loop, terminating at Edgware Road station. It will then reverse and do the full circle anti-clockwise, returning to Hammersmith.

Added benefits:

The changes to service patterns on the Circle line will improve the reliability of the line, enabling services to recover more quickly if there is a disruption. The line will still be called the Circle line and shown as a circle on the Tube map. The added benefit will be the improved service on the Hammersmith & City line from Edgware Road round to Hammersmith, almost doubling the frequency on that route. This is the first phase of the Sub Surface lines upgrade, which will include a new fleet of air conditioned and accessible trains and a new state of the art signalling system.