seats, formed part of the Southern Ireland state, envisaged by the Government of Ireland Act 1920, and were to be part of the forthcoming Irish Free State, as envisaged by the Anglo-Irish Treaty of 1921, and thus were not part of the House of Commons 1922 election. Tyrone North-West--Arthur Griffith (Sinn Féin) died 12 August 1922 – seat replaced by Fermanagh and Tyrone for the House of Commons 1922 election. Changes 1921 May: Unionist MPs in Northern Ireland are classified in this article as Ulster Unionists instead of Irish Unionists, due to the implementation of the Government of Ireland Act 1920 and the partition of Ireland. References 1918 1918 United Kingdom general election List UK MPs