M&S introduces invisible UV tags to track packaging through recycling system - The supermarket is the first to roll out the packaging tags on shop shelves.

Covered materials typically include plastic used in the packaging containing a product for sale and may also include glass, ceramic, metal, paper, cartons, wood and other packaging materials.

Mark Hitschmann, head of packaging at M&S Food, said: “We expect to gain more data and insight around what is happening to our packaging in the real world through our work with Polytag.