Mary Lou McDonald (front), president of Irish Republicans Sinn Fein leaves with Rhun ap Iorwerth (back R) of Plaid Cymru in Wales and Scottish Nationalist Party (SNP) leader John Swinney (back L) at the end of a press conference following a meeting between the leaders of the main Scottish, Northern Irish and Welsh parties in Cardiff, Wales on September 14, 2026, to press for self-determination votes in their territories. The leaders of the main Scottish, Northern Irish and Welsh parties on September 14 declared their right to "self determination" in a joint agreement signed at a rare meeting in the Welsh capital Cardiff. (Photo by Adrian DENNIS / AFP via Getty Images)