Waitrose has expanded its partnership with recycling technology firm Polytag, launching a nationwide scheme to monitor plastic recycling. The supermarket chain is the first on the high street to implement invisible recycling tags at scale, adding them to the plastic packaging of most of its own-brand fresh milk products. There are also plans in place to add these tags to other major product lines . Waitrose's £100,000 investment in detection units at two of the UK's largest and most AI-advanced