Paragraph 4

the face of the base of the anchor or mooring that is nearest to any tunnel structure forming part of Work No. 1 or 5 would be within a circular zone having a radius of 9 metres centred on the centre point of the tunnel structure in cross-section; or

a line drawn at 45 degrees above the plane of horizontal commencing from and touching the face referred to in paragraph (a) would enter that zone.

At any time after this Order has been made DLRL may give notice to the Port of London Authority that DLRL is intending to construct the authorised works and that accordingly it requires the restrictions in sub-paragraph (4) to take effect. Any such notice shall be accompanied by a plan on a scale of not less than 1:2500 and sections and cross-sections on scales of not less than 1:100 showing the intended situation and levels of Works Nos. 1 and 5 where any part of them is intended to pass under the River Thames.

If the restrictions in sub-paragraph (4) are brought into effect by a notice given pursuant to and in accordance with sub-paragraph (5), they shall cease to have effect if the authorised works are not subsequently commenced within 5 years of the coming into force of this Order.

Following notice to the Port of London Authority given by DLRL at any time after construction of the authorised works has been commenced, the Port of London Authority will not thereafter remove so much of any mooring or anchor that is within the bed of the River Thames at that time if there is any prospect that in doing so the zone mentioned in sub-paragraph (4) could be disturbed.

If by virtue of sub-paragraph (4) the Port of London Authority is unable to replace an existing screw mooring in the same place, DLRL will pay to the Authority the costs reasonably incurred by it in removing and replacing any second screw mooring which is used in conjunction with that mooring to moor vessels fore and aft.