asked the Chancellor of the Exchequer what would be the yield in a full year of increasing the duty on petrol by 10p a gallon, 20p a gallon and 30p a gallon, respectively.

pursuant to his reply [Official Report, 20th November 1978; Vol. 958, c. 477], gave the following information:In the absence of other changes, in-creases in the excise duty on petrol of 10p, 20p and 30p per gallon would yield additional revenue, including consequential increases in VAT receipts, of about £465 million, £925 million and £1,380 million, respectively in a full year.