11U.K.If, in the carrying out of any specified work, or any work for the provision of new, altered or substituted sewers or protective works in pursuance of paragraph 5 above, the appropriate authority damage or, without the consent of the sewerage authority, alter or in any way interfere with any of their existing sewers the appropriate authority shall—
(a)pay to the sewerage authority any additional expense to which they may be put in the maintenance, management or renewal of any new, altered or substituted sewer which may be necessary in consequence of the construction of the specified work; and
(b)subject to paragraph 13 below, give to the sewerage authority uninterrupted access to any such new, altered or substituted sewer and such facilities as may be reasonably required for the inspection, maintenance, alteration and repair thereof.