Oh, and by the way, I can also confirm that loading trucks -> trains works. I just realised I have a setup where trucks ship ore to a train station and it transfers just fine: http://cloud-4.steampowered.com/ugc/50986086040097246/D570EA9AFD1AB41E95C2CD1CAF12548CB39AD1A0/
Interestingly, although the train station is called “lower basingstoke” when clicked, the schedule for the line calls it “basingstoke exchange”. Don’t know if this is relevant.