On Tue, 28 Sep 2010 10:24:05 +0100, "Richard J."
wrote:

Basil Jet wrote on 28 September 2010
02:52:42 ...
On 2010\09\28 02:28, Charles Ellson wrote:
On Mon, 27 Sep 2010 23:35:24 +0100, "Graham Harrison"
wrote:

On the "Main Line" trains are usually referred to as going "up" or "down" by
the staff. However, it seems that, even "London Transport" refer to
Underground lines by their geographic direction;

First, try defining up/down on the Circle Line.

Try defining north/south/east/west on the Circle Line. ;-)

Unfortunately LU do so. I've heard references to "westbound Circle
Line" at High Street Kensington, referring to the inner rail which goes
south then east.

That is just one station not the whole line.