3E+WFor the purpose of determining the amount recoverable under paragraph 2 above in respect of any relevant assistance, the value of that assistance shall be taken to be—
(a)in the case of a payment, an amount equal to the payment;
(b)in a case within paragraph 1(1)(a), (b), (c) or (d) above, such amount as the local authority would have had to pay on the open market in order, at the material time, to secure the carrying out of the works, or to obtain the goods or services or the use of the vehicle, plant or apparatus in question.