asked the Secretary of State for Social Services, if inflation continues at a steady rate of 16 ½ per cent. for the next three years and invalidity benefit is uprated by 11½ per cent. in 1981 and 1982, what income tax would be paid by (a) a single person, (b) a married couple whose sole income consisted of (i) invalidity pension alone, (ii) invalidity pension together with the lower rate of invalidity allowance, (iii) invalidity pension with the middle rate of invalidity allowance and (iv) invalidity pension with the higher rate of invalidity allowance in the tax year 1981–82 and the tax year 1982–83; and what income tax would be paid in the same years if invalidity benefit were uprated by 16½ per cent. in the current year, 1981 and 1982.
I have been asked to reply.I shall let the hon. Member have a reply as soon as possible.