Z-M I've checked and mine are actually stamped Dunelm.
As a follow-on, when you are the proud possessors of a gleaming set of promises of culinary appeal (i.e. new pans)can I appeal to you to clean and give your old ones to a homeless charity, please? I don't know one in your area but I scoured mine and handed them over to The Hinge at Bridlington, who gave them to a middle-aged couple who had become homeless through no fault of their own. The Hinge had found them a flat and our pans helped to give them a start. Thanks. :)