And consider this - here we are, fifty-odd years after Dr. Beeching closed a third of the British railway network, at which time ALL trains would have just been fitted with the standard poop chute.
So if we assume, since Beeching cut the network mileage by roughly a third, that there'd have been roughly 1.5 times as many carriages about, that means that there'd have been 15 times the volume of raw sewage being flung about as there is today. And bear in mind that's probably an underestimate, because trains were a lot more popular then. So back in the 1940s and 1950s people would have been merrily trooping off on the train in their thousands:
- to the seaside
- to work
- to war to be senselessly slaughtered in huge numbers