4Before commencing the construction of any works, or carrying out any operations, at any of the sites to which this schedule applies, the authorised undertaker shall consult SNH regarding—
(a)detailed engineering design;
(b)construction methods;
(c)pollution control;
(d)timing of works and operations;
(e)conservation of specific habitats or of habitats of specific species,
and shall implement such detailed mitigation measures regarding such matters as SNH may require.