What is the official name of Great Britain now?

The correct official name of the country is the United Kingdom of Great Britain and Northern Ireland or the UK in short. Great Britain is the name of a single island, one of the largest British Islands. Three countries are located there: Scotland, Wales and England. The fourth part of the United Kingdom is located on the separate island, Ireland. There are two countries on this island: one of them is the independent Irish Republic and the other is Northern Ireland, which is the part of the UK.