Tony BLAIR, who served as Prime Minister of the United Kingdom from 1997 to 2007, is a five-letter answer to the crossword clue 'Former British Prime Minister'. Anthony EDEN was Prime Minister from 1955 to 1957 and is a four-letter answer to the same clue. Clement Attlee was Prime Minister from 1945 to 1951 and is a five-letter answer to the same clue. Edward HEATH was Prime Minister from 1970 to 1974 and is a five-letter answer to the same clue. Lastly, John MAJOR was Prime Minister from 1990 to 1997 and is a five-letter answer to the same clue.