"Home internationals" (an example is the British Home Championship in football). The governing body for football in Northern Ireland is called the Irish Football Association (the IFA), having been in existence since some forty years before Partition. Its counterpart in the Republic (plus Derry City FC) is the Football Association of Ireland (the FAI). The Northern Ireland national team retained the name "Ireland" for some fifty years after partition. Since around 1970 the two teams have been consistently referred to as "Northern Ireland" and "Republic of Ireland" respectively. The UK competes as Great Britain at the Olympic Games. According to the Olympic Charter the Olympic Council of Ireland represents the entire island of Ireland. Olympic athletes from Northern Ireland may choose whether to represent the UK or the Republic of Ireland. Since the Good Friday Agreement and the subsequent implementation legislation, sporting organisation (and several other organisations, e.g. tourism, Irish Gaelic and Ulster Scots language boards) on the island of Ireland has increasingly been cross-border. Citizens of the UK are called British, Britons, Brits, (colloquial) or Britisher (archaic). The term Unionists may also be used when referring to supporters of the Union. Some older slang names for Britons are Tommy (for British soldiers) and Anglo. Anglo properly refers only to England, but it is sometimes used as a broader reference as an element in compound adjectives: for example, "Anglo-French relations" may be used in newspaper articles when referring to relations between the political entities France and the United Kingdom. Anglo-Saxon may be used (particularly in Continental European languages) when referring to the whole English-speaking world. Ireland Since the adoption of the Constitution of Ireland in 1937, Ireland has been the English name of the state which covers approximately five-sixths of the island of Ireland. The name Éire is used when writing in Irish. Since the Republic of Ireland Act 1948, the term "Republic of Ireland" is the term used as the additional description of the state. This term is useful in avoiding ambiguity between the name of the island and the name of the state. However, the term "Ireland" is always used in formal diplomatic contexts such as the European Union or the United Nations. The passport of the Republic of Ireland bears the name Éire – Ireland. Before the introduction of the 1937 constitution and the new name, the Irish Free State occupied the same territory as the modern