The Radioactive Material (Road Transport) (Great Britain) Regulations 1996

12.  In addition to the radioactive properties, any other dangerous properties of the contents of a package, such as explosiveness, flammability, pyrophoricity, chemical, toxicity, corrosiveness and (as in the case of UF6) the possibility of the formation of products having dangerous properties by interaction of the contents with the atmosphere or with water shall be taken into account.