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In page Acton, London:

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More widespread building was planned and took place in the 1850s. As a result of its soft water sources, Acton became famous for its laundries and at the end of the 19th century there were around 170 establishments in South Acton. These laundries would serve hotels and the rich in London's West End, leading to the nickname "Soapsuds Island" or "Soap Sud City". At least 600 different laundries operated within South Acton,[3] the last laundry closed in the late 1970s and is now a low redbrick block of flats.[citation needed]