I don't "need to remember" anything. A friend who works for Freightliner told about this possibilty - Hull can take coal and the Docks Brnach can take up to 22 trains in and out a day and normally isn't used to its full potential. Both ports are owned by ABP and occasionally extra coal has come via Hull, we can tell and all of a sudden our breaks disappear. Both Hull and Immingham have similar motorway links -
Companies involved are the same, cover a third shift on the Hull - Selby line and you can even run through the night. The problem is that at Wrawby/Barnetby they're turning trains round to send via Brigg, this obviously is using up capacity so being able to divert trains clearly has benefits for all involved.
Jon, "you need to remember that" I do work in the area and talk to people involved with the running and planning of local operations.