"any amounts determined in accordance with Schedule 3 (housing costs) which may be applicable to him in respect of mortgage interest payments or such other housing costs as are prescribed in that Schedule."
"(1) Where the amount applicable to a claimant by way of housing costs under regulation 17(1)(e) or regulation 18(1)(f) (as the case may be) in the benefit week which includes1st October 1995 ('the first benefit week') is greater than the amount which, in accordance with paragraphs 6 and 10, is applicable in his case in the next succeeding benefit week ('the second benefit week'), the claimant shall be entitled to have his existing housing costs increased by an amount (referred to in this paragraph as 'add back') determined in accordance with the following provisions of this paragraph. (2) Where the amount to be met by way of housing costs in the first benefit week is greater than the amount to be met in the second benefit week, then the amount of the add back shall be a sum representing the difference between those amounts. (3) Where the amount of existing housing costs, disregarding the add back, which is applicable to the claimant increases after the second benefit week, the amount of the add back shall be decreased by an amount equal to that increase, and the amount of the add back shall thereafter be the decreased amount. (4) Any increase in the amount of the existing housing costs, disregarding the add back, shall reduce the amount of the add back in the manner specified in sub-paragraph (3), and where the amount of the add back is reduced to nil, the amount of the existing housing costs shall thereafter not include any amount by way of add back."
"... consistently with the erosion not causing the level of housing benefit payable to fall as compared with the previous week. Looked at in terms of interest rates, it becomes a means of clawing back the add back whenever an opportunity to do so results from an interest rate rise, rather than a simple means of ensuring that a claimant is not protected to a greater extent than he should be. The latter result would obviously have been thought desirable, but it seems to me much less clear that the former would have been."
"It seems to me that it is implicit that the total amount of the reduction in the add back cannot be more than the amount by which the housing costs exceed or have exceeded their second benefit week level - in other words that any given amount of increase above the second week level can only be counted once for the purpose of determining 'the amount equal to that increase'. I recognise that that view is very arguably open to the objection that it does appear to be intended by para. 7(3) that any increase which qualifies as an increase within the opening words is to result in a decrease in the add back. That impression is strongly confirmed by para. 7(4), stating that 'any increase in the amount of the existing housing costs ... shall reduce the amount of the add back.' At the end of the day, however, it does not seem to me that the wording of paras. 7(3) and (4), taken as a whole, compel the result that every increase which falls within the opening words of para. 7(3) (i.e. even an increase which duplicates a previous increase) must result in a reduction of the add back. Whilst para. 7(4), looked at on it own, does most strongly indicate that result, the purpose of para. 7(4) was in my view merely to make clear that once the add back has been entirely eroded it cannot be reinstated."
"MIPS [i.e. the add back] will be reduced by: • any increase in the standard rate;"