Winnington is a small, mainly residential area of the town of Northwich in Cheshire, England. ==Industry== Winnington is the home to Brunner Mond UK chemical works, where soda ash is created. Polythene, the material used in many plastic items (e.g. plastic bags), was first made at the chemical works by R.O. Gibson and E.W. Fawcett in 1933, during ...