Why did Edwin Poots resign as DUP leader and who will replace him?

Analysis: The leader of the Democratic Unionist party in Northern Ireland has quit after just 21 days in the job

Poots quit on Thursday night because colleagues revolted over a deal he had agreed with Sinn Fein and the British government about Irish language legislation. The deal clinched Sinn Fein's agreement to revive the stalled Stormont executive and to install Poots' protege Paul Givan as first minister. But DUP assembly members and Westminster MPs considered it a concession too far.