The War Illustrated, Volume 3, No. 46, Page 55, July 19, 1940.

In the House of Commons on June 27th Mr. Herbert Morrison stated that the voluntary effort for salvage had not been altogether successful. In consequence a new Ministry of Supply order made the collection of salvage compulsory for all local authorities with a population exceeding 10,000. Expert sorters are at work all day separating and grading the great mass of material received. They deal with 92 grades of bottles, 13 grades of non-ferrous metals, various grades of paper, rag and other forms of refuse. It is the duty of householders to put all waste paper and cardboard, scrap metal and bones in separate bundles to be called for by collectors, who may be the Council dustmen, rag and bone merchants, or voluntary organizations.