The story
The company was founded in 1958 as United Dairy and Poultry Co-operative Limited and later renamed Gay Lea Foods Co-operative Limited, to reflect the brand name of its products.
In 1981, Gay Lea purchased the 106-year-old Teeswater Creamery. They also acquired Stirling Creamery in 2016.
From Wikipedia’s article on Gay Lea, shared under CC BY-SA 4.0.4