This undated image, released by utility company Thames Water company, shows part of a 15-ton lump of fat and other debris coagulated inside a main London city sewer, which they have spent many days clearing from the drain, the company announced on Aug. 6, 2013. (Associated Press)

Photo by: Uncredited

This undated image, released by utility company Thames Water company, shows part of a 15-ton lump of fat and other debris coagulated inside a main London city sewer, which they have spent many days clearing from the drain, the company announced on Aug. 6, 2013. (Associated Press)