what is the role of the king and queen in england
The monarch and their immediate family undertake various official, ceremonial, diplomatic and representational duties.
Monarchy of the United Kingdom
The monarch and their immediate family undertake various official, ceremonial, diplomatic and representational duties. 
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Monarchy of the United Kingdom [SEP] Introduction
The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the constitutional monarchy of the United Kingdom, its dependencies (the Bailiwick of Guernsey, the Bailiwick of Jersey and the Isle of Man) and its overseas territories. The current monarch and head of state is Queen Elizabeth II, who ascended the throne in 1952. The monarch and their immediate family undertake various official, ceremonial, diplomatic and representational duties. As the monarchy is constitutional the monarch is limited to functions such as bestowing honours and appointing the prime minister, which are performed in a non-partisan manner. The monarch is also Head of the British Armed Forces.