The Republic of Ireland. It has a border with Northern Ireland, which is part of the UK.
Ireland
The portion of the UK that is Northern Ireland shares a border with Ireland (Republic of Eire) The rest of the UK is an island, and does not border any country.
There is only one that is Northern Ireland (UK)
No. Europe is a continent which the UK is a part of.
The UK is an island and doesn't share a land border with any other country. The UK is formed by England, Scotland, Wales. In addition Northern Ireland is part of the UK but it not connected by a land mass. Its seperated by the Irish Sea and North Channel. Not strictly true. England, Scotland and Wales is Great Britain. When Northern Ireland is included, the country then becomes 'The United Kingdom of Great Britain and Northern Ireland'. Great Britain doesn't share a border with any other country but the United Kingdom shares a border with the Republic of Ireland.
Spain shares borders with France, Portugal, Andorra, Morocco, and the UK. Pick any other country and it will not share a border with Spain.
Denmark proper only shares a land border with one country : Germany (68 km). Across the sea Denmark is surrounded by UK, Norway and Sweden.
The UK is a part of Europe.
Russia is the largest country in Europe. The Ukraine is the largest country wholly in Europe.
Portugal, France, the UK (Gibraltar) and Andorra border Spain in Europe.
Next to Norway is Sweden, Finland, and Russia!
Northern Ireland which is part of the UK