Article 4 Increases in certain lump sums
In respect of any lump sum or instalment of a lump sum which became payable before 24th November 1980 but after 11th November 1979 there may be paid an increase of 16·5 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 where
(a)
A is the number of complete months in the period between the beginning date for the lump sum or, if later, 12th November 1979 and the date on which it became payable; and
(b)
B is 12.