the undertaking of light-duty vehicle emissions testing for the purposes of the “New In-Service Conformity (ISC) Methodology”, introduced in Annex II (Part B) of Regulation (GB) 2017/1151, as amended by SI 2022 No.1273 (https://www.legislation.gov.uk/eur/2017/1151/contents) and Annex 4 of UN Regulation No. 83.08 (https://unece.org/sites/default/files/2024-04/ECE-TRANS-WP.29-2023-57E.pdf)