The other oddity about Shipley, if I recall correctly, is that the Bradford -> Leeds platform is actually bidirectional for the sake of the EC sets that use it, the normal Leeds->Bradford platform not being long enough. They're platforms 3&4 but can't recall which is which.
Having read through this thread, Shipley definitely gets my personal vote for the most bizarre layout, in regard to its size/use. It confused me when I first encountered it and still does, not least because most possible destinations have a choice of two totally unrelated platforms to wait on.
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Trains can depart from each of the through platforms to north, or south, destinations from Newcastle Central and from the North facing bay Platform 1. The north facing bay clearly departs north, for northbound, or southbound, whereas the through platform trains can depart south for southbound and north for northbound, or southbound. This is due to the two bridges linking the ECML, Durham coast line and Newcastle with the Gateshead link lines. It is rare for main line trains to depart north for southbound ECML, but Cross Country have done so and local trains for the Newcastle-Carlisle line often do. It is also used to turn EastCoast sets which are the wrong way round, I have been on just such a Mk4 set recently. Very confusing for regular travellers!
This goes back about 12 years, but I was onboard the northbound HST Chieftain one day when they decided to turn it at Newcastle - not sure why, it was in the normal orientation, but maybe the power unit at the "A" end had failed - so we went round the loop and entered the station from the north. No problem until we started to depart in the direction we had arrived from - widespread panic amongst passengers who thought the train had terminated and was going back to London. It was interesting to complete the journey with the "H" end leading (told you it was an old story) and the first class single seats on the left hand side of the train.
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Unless I've just missed it, surprised no-one's mentioned Birmingham NS yet. Prior to the 1960s reconstruction, it was really two stations side by side, with a limited amount of cross-over pointwork at each end. There was even a road running through the middle between the two sets of platforms. I can recall catching a train from there, entering via the old Stephenson Street entrance (on the north side) and being told my platform was "on the other side" - I think there was just one bridge link over the roadway to the "other side".
The 1960s reconstruction muddied the appearance (in more ways than one) but there are still some platforms only accessible from one of another of the two main routes east and west.