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Parliament of Northern Ireland

Bicameral legislature of Northern Ireland (1921–1972)

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Through Home rule, Bicameralism and First-past-the-post voting

The Parliament of Northern Ireland was bicameral, consisting of a House of Commons with 52 seats, and an indirectly elected Senate with 26 seats. The Sovereign was represented by the governor (initially by the Lord Lieutenant), who granted royal assent to Acts of Parliament in Northern Ireland, but executive power rested with the prime minister, the leader of the largest party in the House of Commons.

House of Commons

The House of Commons had 52 members, of which 48 were for territorial seats, and four were for graduates of Queen's University, Belfast (until 1969, when the four university seats were replaced by an additional four territorial seats, alongside the abolition of plural voting). The Government of Ireland Act 1920 prescribed that elections to the House of Commons should be by single transferable vote (STV), though the Parliament was given the power to alter the electoral system from three years after its first meeting. The STV system was the subject of criticism from grassroots Unionists, but because the three-year period ended during the Labour government of 1924, the Stormont government decided not to provoke the known egalitarian sympathies of many Labour backbenchers and held the second election on the same basis. The loss of eight Unionist seats in that election caused great acrimony, and in 1929, the system was changed to first-past-the-post for all territorial constituencies, though STV was retained for the university seats.

In the 1925 election, however, Republicans also lost four seats and a substantial proportion of votes. Nationalists gained the same number of seats that Republicans had lost, but had only gained a small percentage of votes. It had been felt by some that Northern Ireland should use the same first-past-the-post system that was in place in the rest of the UK.

By the time the first-past-the-post system was implemented by the House of Commons (Method of Voting and Redistribution of Seats) Act (Northern Ireland) 1929 (19 Geo. 5. c. 5 (N.I.)) for the 1929 election, the Republicans had few or no candidates and pro-Irish unification voters were represented almost solely by the Nationalist Party. Despite the change in the electoral system and accusations of gerrymandering, the Nationalist Party lost 9.5% share of the vote, but still gained a seat. The more moderate Northern Ireland Labour Party and Ulster Liberal Party both gained in vote share but lost seats.

The boundary changes for 1929 were not made by an impartial boundary commission but by the Unionist government, for which it was accused of gerrymandering. The charges that the Stormont seats (as opposed to local council wards) were gerrymandered against Nationalists is disputed by historians (since the number of Nationalists elected under the two systems barely changed), though it is agreed that losses under the change to single-member constituency boundaries were suffered by independent unionists, the Liberals and the Northern Ireland Labour Party. Population movements were so small that these boundaries were used almost everywhere until the Parliament was dissolved in 1972. In 1968 the government abolished the Queen's University constituency (university constituencies had been abolished at Westminster with effect from 1950) and created four new constituencies in the outskirts of Belfast where populations had grown. This change helped the Unionists, as they held only two of the university seats but won all four of the newly created seats. There had, however, long been calls from outside Unionism to abolish the graduate franchise (and other anomalies) and to have "one person one vote".

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