§ 6. Mr. Hastings
asked the Minister of Fuel and Power how many grades of coal are recognised by his Department; and on what criteria grading is determined.
§ Mr. Geoffrey Lloyd
Seven, for house coal. The main criteria are size, ash content, rate of burning and calorific value.
§ Mr. Hastings
Is the category of any coal at any given colliery determined by a committee, or how exactly is it arranged?