This train will self combust in 5...4...3...2..

A 9 carriage train leaves London at 07:21 to Plymouth. By 11:37 only 3 carriages arrive. It's a great money saving technique, 3 trains in one, but for people like me who join early in the train's journey, can it get anymore complicated?

First, you need to figure out which part of your train is going to where you want to go to. The whole train goes to Salisbury where the train divides. The front 6 coaches continue to Exeter where the train loses another few carriages. Then the rear 3 coaches (who needs consistency?) go on to Plymouth.

Just in case you're finding it hard to follow that, due to short platforms at certain stations, you need to be in the front/rear/middle 2/3/4 coaches as otherwise the doors won't open, and if you want to get off at Basingstoke you'll need to sit opposite a fat man whilst eating a ginger biscuit and stroking a gray guinea pig.