Which British Prime Minister had to travel overseas to kiss hands with the sovereign?

The British Prime Minister who had to travel overseas to kiss hands with the sovereign was Sir Winston Churchill. In 1941, he traveled to the United States to meet President Franklin D. Roosevelt, which was both a diplomatic and symbolic gesture during World War II. The phrase "kiss hands" reflects the traditional practice of seeking royal approval or recognition, although in Churchill's case, it was more about solidifying the alliance between the UK and the US.