Call for ‘constitutional change in Wales, Scotland and Northern Ireland’ likely to challenge Burnham’s devolution agendaThe first ministers of Wales, Scotland and Northern Ireland are meeting to affirm their nations’ right to seek independence from the UK, as part of a summit that is likely to challenge Andy Burnham’s devolution agenda.Plaid Cymru leader Rhun ap Iorwerth, Scottish National party leader John Swinney and Sinn Féin vice president Michelle O’Neill are expected to sign a