Northern Ireland Assembly Opposition
Open-knowledge reference entry

The role of official opposition in the Northern Ireland Assembly can be taken by larger political parties who do not participate in Northern Ireland's consociational power-sharing Executive. Forming an Assembly Opposition empowers opposition parties to scrutinise the work of government, giving them financial assistance, enhanced speaking rights in the chamber and the right to chair certain committees.
While the Assembly and Executive had been in operation since 1998 and 1999, respectively (following the Good Friday Agreement), the Assembly Opposition was only established in 2016, as part of the Fresh Start Agreement. The opportunity was first taken by the Ulster Unionist Party and Social Democratic and Labour Party for the Assembly's fifth term, following the May 2016 assembly election, and has once again been taken by the SDLP since the May 2022 assembly election.
Opposition in previous legislatures
Northern Ireland was governed from 1921 to 1972 by a bicameral Parliament, where in the lower House of Commons the largest and therefore the governing party was consistently the Ulster Unionist Party. It could have been expected, following the Westminster system, that the role of official Opposition would be taken by largest party outside of government, which was consistently an Irish nationalist party (jointly Sinn Féin and the Nationalist Party in the Parliament's first term from 1921 to 1925, and thereafter the Nationalist Party). However, during this time members of the Nationalist opposition often practised a policy of abstentionism where they would run for seats in the parliament but refuse to take them if elected, in order not to give legitimacy to British rule or the partition of the island. Nationalist Party members refused to take their seats in the legislature until 1924, and resumed the abstentionist policy in the 1930s to protest the abolition of proportional representation. From 1937, Thomas Joseph Campbell and Richard Byrne were the only Nationalist MPs to take their seats until Byrne's death in 1942 and Campbell's resignation in 1945.
It was not until February 1965 that the Nationalist Party agreed to accept recognition as the Official Opposition in the House of Commons.
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