The daughter of a former scaffolder at Rugeley Power Station who died of an asbestos-related cancer is appealing to her father’s former colleagues to come forward in the hope they have vital information about how he was exposed to the deadly dust. Father-of-four Gary Williams, from West Bromwich died in July 2013 after being diagnosed with mesothelioma, a cancer in the lining of the lungs, in October 2012.