Por que o REINO UNIDO não tem uma seleção de futebol?

Have you ever stopped to think about why the United Kingdom doesn't have a national football team in the World Cup? In Olympic sports, the country competes under the British flag. But in competitions organized by FIFA, the story is completely different. Instead of a single national team, four different teams take to the field: England, Scotland, Wales, and Northern Ireland. But how is this possible? After all, if the United Kingdom is a country, why doesn't it have a single national football team?