 He transferred to the Royal Flying Corps as an observer, but while demonstrating in front of his mother and sister he crashed, which left him with a permanent limp, as well as a reputation for being brave and somewhat reckless.He returned to the trenches before the injury had fully healed and at the Battle of Loos (1915) passed out at his post from pain.He spent the remainder of the war at desk jobs in the Ministry of Munitions and in the Foreign Office.