Was just browsing the web for historical crime in the area, as in way back in the past.
Can't find much but did read this - phwoo-hoo, seems excessive I bet £5 was a lot of money back then!
Stockport Advertiser - 29th November 1879
Adulterated Milk
Alfred Lomas of Hill Top Farm, Marple, was prosecuted for selling adulterated milk. Examined at Ardwick Station part of a consignment of cans to Isaac Newton, Milk Dealer, Grey Mare Lane, Bradford, contained 12% added water. Mr Lomas claimed the water must have been added on the way to the station or when the sample was abstracted. He also said that a few weeks before a servant girl whose duty was to stir the milk whilst cooling in a water trough next to the pump and either through indolence or an effort to speed the process made a practice of pouring water into the milk until caught in the act (laughter in court). Lomas was fined £5 and costs.