Read this and answer the question. If the question is unanswerable, say "unanswerable".

In 1940, Winston Churchill replaced Neville Chamberlain as Prime Minister, though personally George would have preferred to appoint Lord Halifax. After the King's initial dismay over Churchill's appointment of Lord Beaverbrook to the Cabinet, he and Churchill developed "the closest personal relationship in modern British history between a monarch and a Prime Minister". Every Tuesday for four and a half years from September 1940, the two men met privately for lunch to discuss the war in secret and with frankness.

Who was Winston Churchill's predecessor?
Neville Chamberlain