Britain's constitutional future is facing renewed pressure as pro-independence political leaders from Scotland, Wales and Northern Ireland gather in Cardiff on Monday, 14 September, to strengthen cooperation over their nations' right to determine their own futures.
Scottish First Minister John Swinney, Welsh First Minister Rhun ap Iorwerth and Northern Ireland First Minister Michelle O'Neill are attending alongside Sinn Féin president Mary Lou McDonald. Crucially, the three First Ministers are participating in their capacities as party leaders rather than as heads of their devolved governments, keeping the meeting separate from formal intergovernmental business.