Abstract
This is a JNCC-commissioned report completed by SMRU Consulting. The primary intended audience is the JNCC and other statutory nature conservation bodies, to provide a resource to inform development of their guidance.
This report represents one of two complementary reports in contribution to an evidence review of harbour porpoise disturbance ranges in the context of the assessment and management of impulsive noise in Special Areas of Conservation. The current report covers impact piling. The second report covers all other relevant noise sources (Majewska et al. 2025). Each report has been written to be stand-alone, so some introductory material is duplicated between the two reports.