Revenue stamps of Northern Ireland
Upon the partition of Ireland in 1921, separate revenue stamps began to be issued for both Northern Ireland and Southern Ireland. The latter were withdrawn soon afterwards upon the establishment of the Provisional Government, but the former continued to issue revenue stamps until the late 20th century. The need for separate issues for Northern Ireland came about since taxes raised there were meant to remain in the country. Most Northern Irish revenue stamps were British key types with appropriate inscriptions, but there were a number of different issues as well.
Irish in the British Armed Forces
After the secession of most of Ireland as the Irish Free State and the partition of Ireland, which led to the creation of Northern Ireland, the rule continued to be in place. Particularly during The Troubles, there was a climate of mutual suspicion, as some Ulster unionists regarded elements of the GAA as sympathetic in some ways to the goals of the Provisional IRA and at the same time, the GAA (especially in the North) were suspicious of Royal Ulster Constabulary personnel wishing to join. As part of the Northern Ireland peace process and the reforming of the police into a more cross-community institution, as the Police Service of Northern Ireland, moves were made to lift the ban. In 2001, during the presidency of Seán McCague, the ban was lifted, with 26 counties voting yes. Members of the Irish diaspora serving in the Irish Guards founded the "Gardaí Éireannach" as part of the London GAA in 2015.