How the general election will be fought in Scotland, Wales and Northern Ireland

John Swinney became SNP leader and Scotland’s first minister earlier this month. Photograph: Andrew Milligan/PA

This general election will be fought in quite different ways across the UK’s four nations – the Scottish National party dominates in Scotland and Labour in Wales. Yet those contests will be defined by Labour’s resurgence just as in England. In Northern Ireland, increasingly isolated unionist parties are pitted against republican Sinn Féin.