<human>:  Who was the best Prime Minister in British history?
<bot>: The question of who was the best Prime Minister in British history is a subjective one and is open to much debate. Many historians have put forward their own opinions, with Winston Churchill often being considered to be the greatest Prime Minister in British history due to the impact of his leadership during World War II. However, others would argue that figures such as William Gladstone, Robert Peel, Margaret Thatcher, and Clement Attlee have also had a significant and positive impact on British history. Ultimately, deciding who was the best Prime Minister in British history is a matter of opinion.