asked the Chancellor of the Exchequer what would be the annual cost to the Exchequer of reducing income tax to the following levels: taxable income £0 to £1,000 15 per cent., £1,000 to £5,000 20 per cent., £5,000 to £10,000 25 per cent., £10,000 to £15,000 30 per cent., £15,000 to £20,000 35 per cent., £20,000 to £25,000 40 per cent., £25,000 to £30,000 45 per cent., and over £30,000 50 per cent.

Of the order of £7 billion at 1979–80 income levels.