Bit off message but I once went on a steam railtour from Worcester up to Scotland to ride behind Union of South Africa. Bit like Mallard but not quite as fast. Don't know the number because I'm not a spotter.
Any way, my point is as we went through Crewe every one except me and Lorna, (the reason I went, she thought the trip sounded romantic), stood up and started calling out all the numbers of everything in sight into dictaphones. As we continued on our journey all these numbers were transcribed into books. All of a sudden one of the chaps in our compartment let out a strainge cry of joy that was immediatly stifled by sheer pain. He had now spotted everything on the network. He sat there broken harted, What could he do now for the rest of his life? "Start again?" suggested Lorna. At first he seemed a bit confused that a girl had spoken to him. Then He smiled, thanked her profusely and did just that as we went through Preston.