On 28 Sep, 09:01, David Hansen wrote

That would be a problem, though not a great one.

Two of the larger exceptions down south to up and down referring to
London are South Wales, where up is up the valley, and former
Midland Railway lines where up is towards Derby.

Thanks, that's very interesting. Did the Midland definitions of up/
down remain after grouping, indeed if you travel from Trent jk to
StPan, are you still heading down? Wasn't the former MS&L line was
"up" into Cleethorpes.

Rgds/Ted