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 Southern Ireland stamps saw little use since that political entity was quickly superseded by the Provisional Government of Ireland and later the Irish Free State (both of which applied overprints on various British and Irish revenue stamps).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.
Partition of Ireland
In 1966 the Taoiseach Seán Lemass visited Northern Ireland in secrecy, leading to a return visit to Dublin by Terence O'Neill; it had taken four decades to achieve such a simple meeting. The impact was further reduced when both countries joined the European Economic Community in 1973. With the onset of The Troubles (1969–98) a 1973 referendum showed that a majority of the electorate in Northern Ireland did want to continue the link to Britain as expected, but the referendum was boycotted by Nationalist voters.