Increases in certain lump sums
4. In respect of any lump sum or instalment of a lump sum which became payable before 22nd November 1982 but after 22nd November 1981 there may be paid an increase of 11 per cent of the amount of the lump sum or instalment (as increased by the amount of any increase under section 1 of the 1971 Act or under the existing Orders) multiplied by No math image to display where
(a)A is the number of complete months in the period between the beginning date for the lump sum or, if later, 23rd November 1981 and the date on which it became payable; and
(b)B is 12.