Revenue stamps of the United Kingdom
When Ireland was partitioned into Northern Ireland and Southern Ireland in 1921, separate revenue stamps were issued for both entities. Southern Ireland stamps saw little use since that political entity was quickly superseded by the Provisional Government of Ireland and later the Irish Free State (both of which applied overprints on various British and Irish revenue stamps). However, Northern Ireland continued to use separate revenue stamps until the 1980s. Northern Irish revenues include Civil Service, Dog Licence, Excise and National Insurance stamps, among many others.
History of rail transport in Ireland
In 1875, the D&D and the D&BJct merged to form the "Northern Railway of Ireland" and thirteen months later the Great Northern Railway (Ireland) (GNR(I)) was formed when the Ulster Railway and the INWR joined this concern. Other minor railways were subsequently taken over. At its height, in the thirty or so years prior to World War I, the GNR(I) covered a large area of Ireland between Dublin, Belfast, Derry and Bundoran. By the end of World War II the company was in dire straits. It struggled on until 1953 when it was nationalised by the two Governments, becoming the Great Northern Railway Board.