I was registered with a waste licence, if you carry any waste in your vehicle, you need one. However, the lower tier one only allows you to carry waste generated by yourself. Such as new cable off cuts. If you remove existing cable, and carry that in your van, that license wouldn’t cover you. There was a story in the media some time ago, where a guy had a bag in his van (he’d didn’t have a license) to put all his sandwich wrappers etc in. He got stopped, and given a fpn for that.
Lower tier licence