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 Southern Ireland stamps saw little use since that political entity was quickly superseded by the Provisional Government of Ireland and later the Irish Free State (both of which applied overprints on various British and Irish revenue stamps).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.
Northern Ireland
Unlike England, Scotland and Wales, Northern Ireland has no history of being an independent country or of being a nation in its own right. Some writers describe the United Kingdom as being made up of three countries and one province or point out the difficulties with calling Northern Ireland a country. Authors writing specifically about Northern Ireland dismiss the idea that Northern Ireland is a "country" in general terms, and draw contrasts in this respect with England, Scotland and Wales. Even for the period covering the first 50 years of Northern Ireland's existence, the term "country" is considered inappropriate by some political scientists on the basis that many decisions were still made in London. The absence of a distinct nation of Northern Ireland, separate within the island of Ireland, is also pointed out as being a problem with using the term and is in contrast to England, Scotland, and Wales.