§ Mr. Litterickasked the Secretary of State for Energy if he will publish in the Official Report figures showing the quantity, per unit of volume, of tetraethyl lead contained in five, four, three, and two-star petrol currently being marketed by the major oil companies operating in the United Kingdom, together with the figures for the corresponding time in 1977, 1976, 1975, and 1974.
§ Dr. John CunninghamThe Institute of Petroleum publishes annually the figures shown below for the average lead content of petrol supplied in the United Kingdom. The units are grammes per litre.
Year 5-Star 4-Star 3-Star 2-Star 1974 0.53 0.53 0.50 0–46 1975 0.52 0.51 0.45 0–40 1976 0.51 0.50 0.45 0.40 1977 0.47 0.46 0.45 0.42 Data for 1978 are not yet available.