"Blue Circle Industries" . . . . . . . . "Associated Portland Cement Manufacturers Ltd" . "1900" . . . "Blue Circle Products" . . "APCM (Blue Circle)" . . . "British Portland Cement Manufacturers'" . . . . "Associated Portland Cement Manufacturers Ltd." . "Blue Circle Cement" . . . . . "''Blue Circle Cement''" . "Blue Circle Enterprises" . . . . . "Blue Circle Cement Company" . . . "Blue Circle Group" . . . "Blue Circle Southern" . "BPCM" . "Associated Portland Cement Manufacturers" . "APCM" . "Blue Circle Industries" . "APC" . . . . "Blue Circle" . . . . "Associated Portland Cement Manufacturers, Ltd." . . . . "Acquired" . "local brand of concrete" .