Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Q: Brigadier Sir Iltyd Nicholl Clayton CBE (1886 -- 30 June 1955) was a British Army officer notable for his attachment to the Middle East Office in Cairo during and after World War II and his involvement in the formation of Arab League and formulation of post-war British policy in the Middle East.
A:
Who did Iltyd Nicholl Clayton serve for?