Sinn Féin dominates Northern Ireland council elections.

Sinn Féin has won a historic victory in the Northern Ireland council elections, securing 144 seats and leaving the DUP trailing 22 seats behind. The Alliance Party leapfrogged the Ulster Unionists to become the third-largest local-government party, while the UUP and SDLP suffered heavy losses. The DUP's Stormont boycott helped mobilise the nationalist vote, but many unionists stayed at home. The party's gains at the expense of the UUP have left Sir Jeffrey Donaldson with a renewed mandate to seek changes to the Windsor Framework before returning to Stormont.