We were instructed to provide an acoustics design review of the architect's proposals for this project in Ilford, Essex, and to recommend additional mitigation measures, where required, to achieve the requirements of Approved Document E (Part E of the Building Regulations). Led by sustainability, this block of flats incorporates lightweight steel structures and Passivhaus design. Much time has been spent developing the details around the Metsec framing, to ensure that flanking transmission does not compromise the in-situ sound insulation test results.