Just recently I have taken to catching an early Chiltern Railways train that is non-stop to London Marylebone.
It is the first train of the day that has come any great distance and usually has three carriages. On Monday you are indeed fortunate to get a seat, by the time it gets to Friday you are unlucky if you don't get one.
So, this morning our little commuter club was standing by the designated spot on the platform - you know, the one precisely where your door opens without having to move unnecessarily to board. We had been chatting about this and that and simply commented, as the first two carriages chugged past that there were a few seats free today.
Suddenly, to our consternation, we realised as the train stopped that we were not stood at the rear most door of the last carriage. An extra carriage had been tacked onto the back of the train (not literally, but you know what I mean). So en-masse our band of happy foot soldiers traipsed along the platform, boarded the extra carriage and marvelled at the incredible choice of seats available to use.
We were indeed like children in a sweetie shop... choices, choices, choices.
I have never known a train at that unearthly hour to be anything other than three carriages long. It will probably never happen again, but one can but hope.