§ Mrs. Beckettasked the Secretary of State for Social Services in each year since its introduction, what has been the gross and net saving from the removal from (a) 16 and 17-year-olds, (b) 18 to 20-year-olds supplementary benefit non-householders' rent addition; and what would be the cost of reversing these changes in a full year at 1985–86 benefit rates.