asked the Chancellor of the Exchequer what his latest estimate is of the tax revenue to be derived from the taxation of sickness, unemployment and supplementary benefits at present exempt from tax; and what adjustments in the standard rate of income tax would be required to offset the extension of taxation to such benefits.

For sickness and unemployment benefit about £175 million, equivalent to about 1p off the standard rate. I cannot make an estimate for supplementary benefits but the yield is unlikely to be large.