78.—(1) This article applies for the purpose of calculating the score to be given to a qualifying action which is—
(a)a surplus action; or
(b)an ECO3 interim delivery action.
(2) Where this article applies, the score is equal to the annual cost savings of the qualifying action which are calculated in accordance with the following formula(1)—
E x £0.31 / £17.83.
(3) In paragraph (2), “E” is the ECO3 cost savings for the qualifying action.
£0.31 is the cost that the Department for Business, Energy and Industrial Strategy has estimated would have been incurred by a participant in delivering each £1 in the ECO3 cost savings attributable to the qualifying action.