Paragraph 13 Surface water drainageI1

No part of the authorised development is to commence until written details of the surface water drainage system for that part, in accordance with the flood risk assessment and drainage strategy, reflecting the mitigation measures in chapter 13 of the environmental statement and including means of pollution control, have been submitted to and approved in writing by the Secretary of State following consultation with the relevant planning authority on matters related to their functions, the lead local flood authority, the Environment Agency, and the local highway authority where that the surface water drainage system interacts with a highway maintainable at the expense of that local highway authority.

The drainage system must be constructed and maintained in accordance with the approved details referred to in sub-paragraph (1) unless otherwise agreed in writing by the Secretary of State following consultation with the relevant planning authority, the lead local flood authority and the Environment Agency.