Journalist Brian Rowan gives his analysis of Stormont crisis. #BBCNolan

A full blown crisis at Stormont. What happens next? The UUP is quitting the Executive.The DUP is meeting the Prime Minister and says Sinn Fein should be kicked out. Police are standing by their view that the IRA still exists. Sinn fein says that's just not true. So will it all fall down?

Journalist Brian Rowan gives his analysis.