When a huge fire broke out at Bismark House Mill in Oldham over two months ago, local residents in the small community of Derker assumed it was 'just a mill full of tiles.'
And fire crews who attended the blaze on May 7 believed the same. Greater Manchester Fire and Rescue Service spent four days extinguishing the flames - working under the knowledge the building was empty.
Demolition work had begun to dismantle the mill, which had previously been used to house companies including a tile shop, when workers made a shocking find last Saturday (23 July).