Council Decision (EU) 2021/1710 of 21 September 2021 establishing the position to be adopted on behalf of the European Union in the Specialised Committee on Social Security Coordination established by the Trade and Cooperation Agreement between the European Union and the European Atomic Energy Community, of the one part, and the United Kingdom of Great Britain and Northern Ireland, of the other part, as regards the adoption of a decision to amend the Annexes to the Protocol on Social Security Coordination