Oh no, the train questions begin... now the excessively detailed lore comes out of the woodwork...
It does!
The aforementioned Northern Extension is from Liverpool to Newcastle (partly via the Woodhead route, which is still open ITTL), delayed due to redirection of funds towards, y'know, fighting a war.
Middlesex Junction is the name for what we call Old Oak Common ITTL.
Elizabeth II Airport is near Cublington.
Longeaton Parkway is at Long Eaton, halfway between Derby and Nottingham.
Most of the other place names should be clear enough.
The image used in the wikibox is adapted from one made by Paul Burkitt-Gray here.