In July 1953 the thriving Dartmouth Pottery needed to expand so moved some production to Tunstalwhere they employed 15 people to decorate and glaze work brought up by lorry daily from the Dartmouth Warfleet works. In 1955 the production at Tunstal was expanded to slip casting and firing as an aid to the main pottery at Warfleet Creek. The Keel Street Pottery Company Ltd. also had premises at Tunstall until 1958 when it was taken over by Dartmouth Pottery for their new Britannia Designs part of the business as they had also acquired the Ashley Clough’s business at Buckfast Pottery that had been decorating white ware blanks purchased from the Keel Street Pottery.

Britannia Designs as a Dartmouth Pottery subsidiary company, producing many souvenir articles for the growing tourist trade, a mainstay of the Britannia business for years became jam pots for the Elsenham jam and preserves company.  The Elsenham pottery was marked “Specially made for the Elsenham Quality Foods Ltd by Dartmouth Potteries England”.