Mynychwyd y cyfarfod hefyd gan y Gweinidogion Gordon Lyons ACD a Declan Kearney ACD o Swyddfa Gweithrediaeth Gogledd Iwerddon; Ysgrifennydd y Cabinet dros y Cyfansoddiad, Ewrop a Materion Allanol, Michael Russell ASA ar ran Llywodraeth yr Alban; gyda Changhellor Dugiaeth Caerhirfyn, y Gwir Anrhydeddus Michael Gove AS ar ran Llywodraeth y DU yn cadeirio.
The meeting was also attended by Ministers Gordon Lyons MLA and Declan Kearney MLA of the Northern Ireland Executive Office; Cabinet Secretary for the Constitution, Europe and External Affairs, Michael Russell MSP for the Scottish Government; with Chancellor of the Duchy of Lancaster, the Rt Hon Michael Gove MP on behalf of the UK Government in the chair.