Armley asbestos disaster
The contamination was the result of the activities of a local asbestos factory, part of the Turner & Newall (T&N) group (often referred to by the name of its founders, J. W. Roberts Ltd.) and occurred between the end of the 19th century and 1959 when the factory eventually closed. At its peak the factory had 250 employees. At least 300 former employees are believed to have died from asbestos-related illnesses, and a number of cancer deaths in the Armley area were traced to the factory in 1988 as a result of an investigation by the "Yorkshire Evening Post". The estate was found to have the highest incidence in the country of mesothelioma. As the interval between exposure and diagnosis can be up to 50 years the number of further deaths which may occur due to the factory's emissions or residual dust since its closure cannot be predicted.
Hebden Bridge
Acre Mill was an asbestos factory in the hilltop settlement of Old Town, owned by Cape Insulation Ltd. It was opened in 1939 to meet the demand for gas mask filters made from blue asbestos during the Second World War, and diversified into the production of other asbestos products, including rope, pipe lagging and textile, after the war. In 1970, the company closed the mill and moved to Westmorland. The mill was the subject of a 1971 "World in Action" investigation entitled ""The Dust at Acre Mill"" which revealed how the factory broke the law regarding asbestos-dust control between 1940–1970. By 1979, 12% of a total of 2,200 former employees had asbestos-related disease. The mill was demolished in 1979. Cape Insulation also operated a second factory at Hangingroyd Mill.