London Government Act 1963

7 (1) Where the council of a London borough or county district propose to construct a public sewer or to make a communication between any sewer or drain of theirs and a sewer vested in the Greater London Council, they shall, before beginning any works for the purpose, give notice of the proposal to the Council and shall not proceed with a proposal to make any such communication except with the written approval and in accordance with the directions of the Council.

(2) Any notice under this paragraph shall be accompanied by—

(a) plans and sections of the sewer or communication, as the case may be, drawn to such convenient scale, and showing its location and such other matters, as the Council may direct, and

(b) such other particulars of the proposal as the Council may direct.

(3) Any dispute as to whether any approval under this paragraph has been unreasonably withheld or whether any directions thereunder are unreasonable shall, in default of agreement, be determined by the Minister.