Gas Act 1986

5 (1) Subject to sub-paragraph (2) below, where gas is supplied to a tariff customer through a meter, the register of the meter shall be prima facie evidence of the quantity of gas supplied.

(2) Where a meter through which a tariff customer is supplied with gas is found, when examined by a meter examiner appointed under section 17 of this Act, to register erroneously to a degree exceeding the degree permitted by regulations under that section

(a) the meter shall be deemed to have registered erroneously to the degree so found since the relevant date, except in a case where it is proved to have begun to register erroneously as aforesaid on some later date; and

(b) the amount of allowance to be made to, or the surcharge to be made on, the customer by the supplier in consequence of the erroneous registration shall be paid to or by the customer, as the case may be.

(3) In sub-paragraph (2) above " the relevant date " means the penultimate date on which, otherwise than in connection with the examination, the register of the meter was ascertained.