Hazardous wastes are now specifically addressed, however the regulations relating to them will not come into force until 1 Jun 2019.
Regulation 1.4 states that the regulations apply to wastes from manufacturing and industrial processes if it is reasonably likely that it would be classified as explosive, flammable, oxidising, toxic or corrosive.
There are specific provisions for the labelling (Reg 2.2) and recording (Reg 3.1) of wastes. These provisions do take into account the that fact that some information may not be available. Otherwise the regulations will apply to wastes based on their classification.