Page last updated at 10:29 GMT, Tuesday, 6 October 2009 11:29 UK

In Northern Ireland, unionism is the political belief that the six counties of the north east of Ireland known as Nothern Ireland following the partition of the country in 1921 should remain part of the United Kingdom.

The main unionist parties in the Northern Ireland Assembly are the Democratic Unionist Party and the Ulster Unionist Party.

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