The Deputy Prime Minister (or DPM) is, when appointed, the second highest ranking executive officer of the government of the United Kingdom. He or she would be the deputy chief of the Cabinet.
Unlike other countries, the position of Deputy Prime Minister is not always needed or appointed. The Prime Minister chooses whether or not they want to have a deputy.
The position was created in 1942: Clement Attlee was the first Deputy Prime Minister. The present holder of this position is Dominic Raab from 25 October 2022. There have been times when the post has been very important. Its introduction in the Second World War is the most obvious case.