asked the Secretary of State for energy if he will give the price of coking coal on 1st January in each of the past five years.

Following is the information requested:

Average pithead proceeds for coals supplied to coke ovens
	£/ton
1st January 1970	6·7
1st January 1971	7·1
1st January 1972	8·2
1st January 1973	8·8
1st January 1974	9·6
1st January 1975	17·3

asked the Secretary of State for Energy (1) if he will list the separate increases in the price of domestic coal during the past three years, including the recent announcement;(2) if he will detail the separate dates on which domestic coal prices were increased during the past five years and the rate of increase on each occasion, including the increases already announced.

Following are the average increases made by the NCB in domestic coal prices over the last five years:

	£/ton
1st July 1971	1·0
26th March 1972	0·7
1st November 1974	2·5

From 1st April 1975 NCB prices will be increased by an average of £3 a ton. The immediate effect of this increase will be offset by a summer discount of £2 a ton effective from 1st April to 30th September.

asked the Secretary of State for Energy if he will list the separate price increases of industrial coal during the past three years, including projected rates.

PITHEAD PRICE INCREASES IN INDUSTRIAL FORMULA COALS
			26th March 1972	1st July 1973	1st April 1974	1st October 1974	1st March 1975
Average percentage increase	…	…	7½	7½	43	26	30