For weeks General Tim Cross has been the British deputy at the US led Office of Reconstruction and Humanitarian Aid (ORHA) in Washington. Today he's flown back to London with some very bad news. But will anyone listen?

A diplomatic battle raging at the UN where the British and Americans are intensely lobbying for a second resolution that will authorise war. They are met by fierce hostility and resistance by countries who want to give the weapons inspectors more time in Iraq.

It's the day of the Commons vote on war. Harriet Walter and Adrian Rawlins play MPs facing mutual crises of conscience in the face of intense lobbying and pressure from a Whip in the shape of Alex Jennings. A day of extreme emotions culminates in a vote that will not only decide whether we go to war, it will also seal the fate of the Prime Minister.