HC Deb 26 June 1978 vol 952 cc446-7W
Mr. Wigley

asked the Chancellor of the Exchequer what would be the effect on the retail price index if excise duties were indexed.

Mr. Robert Sheldon

It is estimated that the effect of continuous indexation of specific excise duties to the RPI would be to magnify movements in the RPI by a factor of about 1.09 compared with a situation in which specific duties were left unchanged.