Senior Research Fellow Denise Cheong and Research Associate Nivedita S attended the annual meeting of the OSPAR’s Radioactive Substances Committee (RSC) held from 9 to 11 February 2021. They were part of the delegation of the Advisory Committee on Protection of the Sea (ACOPS), a non-governmental organisation with observer status with the OSPAR Commission. Held virtually, the main focus of this meeting was to progress the drafting of the fifth periodic evaluation (5PE) in time for RSC 2022. The purpose of such evaluations is to analyse the progress that Contracting Parties to the OSPAR Convention make towards the OSPAR Radioactive Substances Strategy, which aims to reduce discharges of radioactive substances to the North-East Atlantic. Strategic issues that the RSC monitors include floating nuclear power stations. The International Atomic Energy Agency and the World Nuclear Association also attended as observers. For more information on RSC, see https://www.ospar.org/work-areas/rsc.