In message
,
sidmouth wrote:
I was told that 'up' direction was defined as being the direction
towards the HQ of the founding railway company. Many happened to be in
London, but hence the example of Derby etc.

Each company had its own definition of Up and Down. Often it was Down
from the biggest city, or Down from the headquarters city (see the GCR),
but there was no specific rule or law about it.

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