§ Mr. David Madelasked the Secretary of State for Employment what are the numbers of people who are members of affiliated trade unions and the numbers who are not members of such unions, employed in the following industries as defined in the Department of Employment industrial analysis: agriculture, forestry and fishing, mining and quarrying, food, drink and tobacco, coal and petroleum products, chemicals and allied industries, metal manufacture, mechani- 250W cal engineering, electrical engineering, vehicles, paper and publishing, gas, electricity and water, transport and communication, distributive trades and insurance and banking.