M&S has also invested £100,000 into Polytag’s Ecotrace programme, which aims to drive the rollout of a nationwide, invisible UV tag reader network. Co-op, Waitrose and Aldi have also been working with ...

Marks and Spencer has introduced invisible, ultraviolet tags on some milk bottles to track them through the recycling system.

A five-day walkout is scheduled to start next week and could cause significant upheaval to the NHS in England.