We did exactly this - criteria were journey time, which station we entered/left London via and last time trains. Hitchin won because of the last train being 1:30am more than any love for the place.
Naively sitting there wondering why everyone was suddenly moving down the train from the next carriage up, until the smell hits and that sets someone off in your carriage. Repeat until there are no unsullied carriages.
We did exactly this - criteria were journey time, which station we entered/left London via and last time trains. Hitchin won because of the last train being 1:30am more than any love for the place.