Monarchy The UK is a monarchy. This means that the monarch (the king or queen ) is the official head of the country. However, the British monarch does not have political power because Parliament makes the laws .In fact, the monarch is not allowed to enter the Parliament building! At ,the British people vote to choose their local MP (Member of Parliament ). These MPs are usually members of political parties .The leader of the party with the most MPs becomes Prime Minister - head of the British government .