asked the Secretary of State for Social Services if he will list the number of invalidity pensioners receiving (a) no invalidity allowance, (b) lower-rate invalidity allowance, (c) middle-rate invalidity allowance and (d) higher-rate invalidity allowance, tabulated by receipt of (i) no dependency increase, (ii) dependency increase for adult dependent only, (iii) dependency increase for adult and (iv) dependency increase for children but no adult; and if he will break down the information by receipt of invalidity pension for less than one year, more than one year but less than two years, more than two years but less than three years, more than three years but less than four years, more than four years but less than five years and more than five years.

On 3 June 1978 there were 559,250 claimants for invalidity benefit. Statistics are not available in the form requested, but the following is the information relating to invalidity allowance, dependency and duration of spell separately: