The explosion of loyalist anger sparked by the decision to remove the Union Jack from the top of Belfast City Hall a few weeks ago – and the street protests, riots and police clashes that followed – has served as an abrupt reminder of how deeply unsettled the political situation in Northern Ireland remains.

Despite the power-sharing deal struck by Sinn Fein and the Democratic Unionist Party (DUP) in 2007, politics in the province has grown more, not less, polarised as support for the moderate Social Democratic and Labour Party (SDLP) and its unionist equivalent, the Ulster Unionist Party (UUP), has steadily waned.

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