HC Deb 10 June 1964 vol 696 c84W
Mr. Collick

asked the Chancellor of the Exchequer whether he is aware that taking the internal purchasing value of the £ sterling as 20s. in October, 1951, it had declined to 18s. in June, 1954, and to 15s. 11d. in June, 1957; and what was the comparable figure for April, 1964.

Mr. Maurice Macmillan

Yes, based on the movements in the Index of Retail Prices. The comparable figure for April, 1964, was 13s. 6d.