David Ford issues a challenge for Sinn Fein and the DUP: get on and do a deal, and stop playing games. Or rather the game that has obsessed political strategists in Northern Ireland for the last four years: the Blame Game. What persists is a reputation, as Tommie Gorman once put for for coming up short and delivering post dated cheques. If there is grudging agreement on the completion of decommissioning, there remains limited scope for blame around policing. The DUP, at this stage, seems unlikely to want to take a Trimble style leap (into political oblivion as it happened) and expect Sinn Fein to follow.