asked the Chancellor of the Exchequer what would be the revenue cost of raising the threshold for investment income surcharge to £4,000 and levying it at a rate of 10 per cent.

, pursuant to his reply [Official Report, 27th April 1978; Vol. 948, c. 672], gave the following information:About £175 million, at 1978–79 income levels and after taking into account the changes proposed in the Budget Statement.