In message , at 13:15:36 on
Tue, 28 Sep 2010, David Hansen
remarked:
indeed if you travel from Trent jk to StPan, are you still heading down?

I should have been more explicit. Up to Derby applied to lines not
going to London. The result of this is that a train from Birmingham
approaching Derby is running on the Up Main, while a train from
London, which will end up at the same platform, is running on the
Down Main. Both will depart on the Down Main, according to my 1980
Quail map.

Assuming the Birmingham train is going to Sheffield, perhaps. If instead
it heads for Long Eaton and Nottingham, presumably that's up to start
with, then down past Trent Junction?
--
Roland Perry