I want to know the answer to the following question:
In 1963, a notable double agent providing valuable and high-quality reporting for The Times during a war in the late 1930s eventually defected to which country?
All the background I'm provided with is that "He later joined MI6 during World War II, was promoted into senior positions after the war ended, then eventually defected to the Soviet Union in 1963.". Is that enough to answer the question?
Answer: yes