Geographically, the British Isles are the islands of Britain and Ireland and all of their off-shore islands. Politically, they are the United Kingdom and the Republic of Ireland.
Scotland, Wales, and England are all located on the island of Great Britain, which is part of the British Isles. The British Isles are a group of islands located off the northwest coast of Europe, which include Great Britain (England, Scotland, and Wales) and the island of Ireland. The island of Great Britain is separated from the island of Ireland by the Irish Sea.
Island nations are not located on a continental landmass, and therefore are not located on peninsulas. An island nation may contain peninsulas, but, depending on the size of the island it's located on, are usually small. For example, a peninsula on the European island nation of the United Kingdom is Cornwall.
The United States, Britain and Russia.
The island of Great Britain contains England Scotland and Wales.
The Island of Borneo has three sovereign nations with territory on it. Brunei, Malaysia and Indonesia.
France, Britain and the United States control the most islands, but a large portion of island nations in the Caribbean are independent.
These three nations are all located on the island of Great Britain. There is a land boundary between England and Scotland. There is also a land boundary between England and Wales. However, there is no land boundary between Scotland and Wales. Together with Northern Ireland, the full title of the country is 'The United Kingdom of Great Britain and Northern Ireland'. Often shortened to UK , United Kingdom , GB , Great Britain, Britain, and erroneously England.
Australia ; Britain ; China ;
The big three of the United Nations are Franklin D. Roosevelt of USA, Winston Churchill of Britain and Joseph Stalin of Russia.
England. Scotland and Wales
There are only three. They are Scotland, Wales and England. They are on the island known as Great Britain. You are confusing the Great Britain with the United Kingdom. The United Kingdom includes the three countries in Great Britain, and also Northern Ireland which is on the island of Ireland.
Trees, Animals, Houses, Humans, Buildings, Mounains. Pretty much three countries bundles together ( four if you count northen Ireland )