Harsig's Signalling Page 
Harsig's Signalling Page 

Last updated on
2nd March 2021

Harsig's Signalling Page

 Circle Line 

A selection of diagrams showing the signalling arrangements for sections of the Circle Line at different times throughout its history.

Circle and Widened Lines   Kings Cross to Tower Hill 1958
A large of diagram showing the signalling arrangements between Kings Cross and Tower Hill in 1958. It also includes the City Widened Lines and extracts of the area at other dates. 
Metropolitan Railway 1933   Metropolitan Railway 1933
A very large diagram showing virtually all of the Metropolitan Railway as it was in 1933. It includes the northern section of the Circle Line from South Kensington to Aldgate. Make sure you zoom in to see all the detail. 
Hammersmith Branch 1951 Hammersmith Branch (Hammersmith to Edgware Road) 1951
The signalling on the Hammersmith Branch was modernised between 1949 and 1951. This large diagram shows the arrangements just after this work was completed, and also shows how the branch threaded its way through the maze of lines approaching Paddington station. The Hammersmith Branch has been part of the Circle Line since 2009. Make sure you zoom in to see all the detail.
Cromwell Road   Cromwell Road Area 1936 - 1969
A series of diagrams showing the area between Earls Court and High Street Kensington and between Earls Court and South Kensington at various dates between 1936 and 1969. Make sure you zoom in to see all the detail.
MJB2005T   Baker Street SCC 2005
The section of the Circle Line from Baker Street to Aldgate was signalled from the Metropolitan and Jubilee SCC at Baker Street. This diagram shows the whole SCC control area as it was circa 2005. It also shows the Jubilee Line Extension from Green Park to Stratford (controlled from Neasden SCC) and the Bakerloo Line (controlled from the Bakerloo SCC at Baker Street). Make sure you zoom in to see all the detail.
Baker Street   Baker Street 1987 & 2010
Two diagrams showing the arrangements before and after the recent alterations to lengthen some of the platforms at Baker Street (Met). 

Most of the diagrams are in PDF format and to open them you will need Adobe Acrobat Reader. If you do not already have this it can be downloaded from the Adobe Website.

Harsig's Signalling Page