Paragraph 11 Surface and foul water drainageI1

A stage of the authorised development must not commence until written details of the surface and (if any) foul water drainage system (including means of pollution control) have, after consultation with the relevant lead local flood authority and the Environment Agency, been submitted to and approved by the relevant planning authority.

The approved drainage systems for the relevant stage must be constructed in accordance with the approved details and thereafter managed and maintained in accordance with the approved details for the lifetime of the authorised development unless otherwise agreed with the relevant planning authority after consultation with the relevant lead local flood authority and the Environment Agency.

This requirement does not apply to currently operational railway land.