When industrialisation started it started the rapid growth of cities in Britain and large towns. And in the 19th century in the first 30 years some cities including Sheffield and Birmingham the population doubled also in this time Glasgow, Liverpool, Manchester and Leeds more than doubled. Also towns and cities got larger without government supervision or any planning whatsoever. Most of this housing was built by the factory owners which were built for them to rent to their workers to gain more profit, and so they keep most of the money they had earned the factory owners had them poorly built and with as many of these house as they could fit onto one site. The house were built with the cheapest materials they could find to save money to make matters worse they were built back to back and they usually didn't have a single garden. And to make the conditions even worse you know the sink and taps you can go and turn on whenever you like they couldn't do that because they had none also the streets outside weren't much better as they were narrow and had poor drainage capability so the streets were filled with human waste and household rubbish also they was no sewers for the human waste to flow into and the rubbish just stayed there because the council didn't hire anybody to clean it up for them. So how was the sewage from the house collected? I hear you ask well the people that lived in those house relied solely on cesspools which was a pit that the waste was stored in which was later removed by workers know only as night men.