The term 'Part of the United Kingdom' can be summarized by the crossword solution WALES, which is a country located in the western region of Great Britain. WALES is one of the four countries that make up the United Kingdom, along with England, Scotland, and Northern Ireland. It has a population of over 3 million people and its capital city is Cardiff. WALES is known for its beautiful landscapes, its rich cultural heritage, and its unique language, Welsh.