227.—(1) The maritime boundary of a county, city or town shall on the establishment day by virtue of this subsection be deemed to coincide with the ordinary high water mark for the time being, except where in accordance with section 10(4), such boundary already extends beyond that high water mark.

F303[(1A) In subsection (1) the reference to the maritime boundary of a county or city includes, where the context admits, the maritime boundary of a city and county which is the successor authority (within the meaning of the Local Government Reform Act 2014) to a county and to a city, and references in this section to a county or city shall be read accordingly.]

(2)(a) For the avoidance of doubt and without prejudice to subsection (1) it is hereby declared that all land which is above the ordinary high water mark for the time being and which is formed by reclamation or other construction works or by natural accretion or otherwise shall, notwithstanding the provisions of any other enactment, for all purposes, including all functions conferred on a local authority by this or any other enactment, be included in and form part of the county or city to which it is contiguous or connected or where it adjoins or is connected to more than one such county or city in proportion to the extent of the common boundary and the boundary of that county or city shall stand altered accordingly.

(b) Where land referred to in paragraph (a) forms part of a county or city it shall by virtue of this paragraph also for all purposes be included in and form part of F304[…] any other administrative, electoral or geographical district which it adjoins and which is situated within such county or city or where it adjoins more than one such district in proportion to the extent of the common boundary of such districts.

(c) In this section and for purposes of illustration only and without restriction of the definition of land in section 2 as including a structure, land shall be read as including piers, wharves, jetties, breakwaters, walkways, bridges, pylons, tanks or other installations, equipment or apparatus.

(3) Where a local authority becomes aware that land referred to in subsection (2)(a) has by virtue of this section become part of its administrative area, the authority shall notify the Chief Boundary Surveyor of that fact.