In message
, at
07:48:38 on Tue, 25 Sep 2012, Offramp remarked:
The original CSLR between King William Street and Kennington was always
Right Hand Running - no idea why.

When the Bank Extension was opened, the tunnels were flattened out before
London Bridge, but for Right Hand running.

This was normalised at Moorgate after the Euston extension, and at
kennington after the stockwell extension. But as against switch the sides
at the middle (RHR) section, that was left as is.

I think that in order to understand this I need to know what
"flattened out" means.

Put side by side, rather than on top and bottom.

At London Bridge I've been in the old CSLR tunnel and it was vertically
above the current southbound platform.
--
Roland Perry